US President Barack Obama wipes a tear as he speaks about the shooting at Sandy Hook Elementary School in Newtown, Connecticut, during a press briefing at the White House in Washington December 14, 2012. A heavily armed gunman opened fire on school children and staff at a Connecticut elementary school on Friday, killing 26 people including 18 children in the latest in a series of shooting rampages that have tormented the United States this year, US media reported.
US President Barack Obama wipes a tear as he speaks about the shooting at Sandy Hook Elementary School in Newtown, Connecticut, during a press briefing at the White House in Washington December 14, 2012. A heavily armed gunman opened fire on school children and staff at a Connecticut elementary school on Friday, killing 26 people including 18 children in the latest in a series of shooting rampages that have tormented the United States this year, US media reported.
US President Barack Obama wipes a tear as he speaks about the shooting at Sandy Hook Elementary School in Newtown, Connecticut, during a press briefing at the White House in Washington December 14, 2012. A heavily armed gunman opened fire on school children and staff at a Connecticut elementary school on Friday, killing 26 people including 18 children in the latest in a series of shooting rampages that have tormented the United States this year, US media reported.
US President Barack Obama wipes a tear as he speaks about the shooting at Sandy Hook Elementary School in Newtown, Connecticut, during a press briefing at the White House in Washington December 14, 2012. A heavily armed gunman opened fire on school children and staff at a Connecticut elementary school on Friday, killing 26 people including 18 children in the latest in a series of shooting rampages that have tormented the United States this year, US media reported.
Young children wait outside Sandy Hook Elementary School after a shooting in Newtown, Connecticut, December 14, 2012. A shooter opened fire at the elementary school in Newtown, Connecticut, on Friday, killing several people including children, the Hartford Courant newspaper reported.
Young children wait outside Sandy Hook Elementary School after a shooting in Newtown, Connecticut, December 14, 2012. A shooter opened fire at the elementary school in Newtown, Connecticut, on Friday, killing several people including children, the Hartford Courant newspaper reported.
Anthony Falco, chief of police for Hoboken, talks on his mobile phone at a crime scene in Hoboken, New Jersey related to the shootings at Sandy Hook Elementary School, in Newtown, Connecticut December 14, 2012.  In Hoboken, police cordoned off a block in connection with the Connecticut shootings but an officer told reporters there was no body inside, contrary to an earlier media report.
Anthony Falco, chief of police for Hoboken, talks on his mobile phone at a crime scene in Hoboken, New Jersey related to the shootings at Sandy Hook Elementary School, in Newtown, Connecticut December 14, 2012. In Hoboken, police cordoned off a block in connection with the Connecticut shootings but an officer told reporters there was no body inside, contrary to an earlier media report.
A woman comforts a young girl, during a vigil service at the St. Rose of Lima Roman Catholic Church, for victims of the Sandy Hook Elementary School shooting in Newtown, Connecticut, December 14, 2012.
A woman comforts a young girl, during a vigil service at the St. Rose of Lima Roman Catholic Church, for victims of the Sandy Hook Elementary School shooting in Newtown, Connecticut, December 14, 2012.
The families of victims grieve near Sandy Hook Elementary School, were a gunman opened fire on school children and staff in Newtown, Connecticut on December 14, 2012. A heavily armed gunman opened fire on school children and staff at a Connecticut elementary school on Friday, killing at least 26 people, including 20 children, in the latest in a series of shooting rampages that have tormented the United States this year.
The families of victims grieve near Sandy Hook Elementary School, were a gunman opened fire on school children and staff in Newtown, Connecticut on December 14, 2012. A heavily armed gunman opened fire on school children and staff at a Connecticut elementary school on Friday, killing at least 26 people, including 20 children, in the latest in a series of shooting rampages that have tormented the United States this year.
People grieve outside the overflow area of a vigil at the Saint Rose of Lima church in Newtown, Connecticut December 14, 2012. A heavily armed gunman opened fire on school children and staff at a Connecticut elementary school on Friday, killing at least 28 people, including 20 children, in the latest in a series of shooting rampages that have tormented the United States this year.
People grieve outside the overflow area of a vigil at the Saint Rose of Lima church in Newtown, Connecticut December 14, 2012. A heavily armed gunman opened fire on school children and staff at a Connecticut elementary school on Friday, killing at least 28 people, including 20 children, in the latest in a series of shooting rampages that have tormented the United States this year.
US Democratic Senator from Connecticut Richard Blumenthal speaks to mourners gathered inside the St. Rose of Lima Roman Catholic Church at a vigil service for victims of the Sandy Hook Elementary School shooting that left at least 27 people dead - many of them young children - in Newtown, Connecticut, December 14, 2012.
US Democratic Senator from Connecticut Richard Blumenthal speaks to mourners gathered inside the St. Rose of Lima Roman Catholic Church at a vigil service for victims of the Sandy Hook Elementary School shooting that left at least 27 people dead - many of them young children - in Newtown, Connecticut, December 14, 2012.
Anthony Baracey holds flowers honoring victims of the Sandy Hook Elementary school killing before a vigil at the Saint Rose of Lima church in Newtown, Connecticut December 14, 2012. A heavily armed gunman opened fire on school children and staff at a Connecticut elementary school on Friday, killing at least 26 people, including 20 children, in the latest in a series of shooting rampages that have tormented the United States this year.
Anthony Baracey holds flowers honoring victims of the Sandy Hook Elementary school killing before a vigil at the Saint Rose of Lima church in Newtown, Connecticut December 14, 2012. A heavily armed gunman opened fire on school children and staff at a Connecticut elementary school on Friday, killing at least 26 people, including 20 children, in the latest in a series of shooting rampages that have tormented the United States this year.
Dannel Malloy, Governor of Connecticut speaks to mourners gathererd inside the St. Rose of Lima Roman Catholic Church at a vigil service for victims of the Sandy Hook Elementary School shooting that left at least 27 people dead - many of them young children - in Newtown, Connecticut, December 14, 2012.
Dannel Malloy, Governor of Connecticut speaks to mourners gathererd inside the St. Rose of Lima Roman Catholic Church at a vigil service for victims of the Sandy Hook Elementary School shooting that left at least 27 people dead - many of them young children - in Newtown, Connecticut, December 14, 2012.
People pray and stand outside the overflow area of a vigil at the Saint Rose of Lima church in Newtown, Connecticut December 14, 2012. The peace and security of the suburban Connecticut community of Newtown lay shattered on Friday after a gunman attacked a primary school in one of the worst mass shootings in US history. Tearful parents and children gathered around Sandy Hook Elementary School by midday on Friday, surrounded by police vehicles, as young and old alike struggled to make sense of a shooting rampage that killed at least 28 people, including 20 children.
People pray and stand outside the overflow area of a vigil at the Saint Rose of Lima church in Newtown, Connecticut December 14, 2012. The peace and security of the suburban Connecticut community of Newtown lay shattered on Friday after a gunman attacked a primary school in one of the worst mass shootings in US history. Tearful parents and children gathered around Sandy Hook Elementary School by midday on Friday, surrounded by police vehicles, as young and old alike struggled to make sense of a shooting rampage that killed at least 28 people, including 20 children.
Mourners gather inside the St. Rose of Lima Roman Catholic Church at a vigil service for victims of the Sandy Hook Elementary School shooting that left at least 27 people dead - many of them young children - in Newtown, Connecticut, December 14, 2012.
Mourners gather inside the St. Rose of Lima Roman Catholic Church at a vigil service for victims of the Sandy Hook Elementary School shooting that left at least 27 people dead - many of them young children - in Newtown, Connecticut, December 14, 2012.
Candles commemorating victims of a Connecticut elementary school shooting burn during a vigil in Oakland, California, December 14, 2012. Twenty schoolchildren were slaughtered by a heavily armed gunman who opened fire at a suburban elementary school in Connecticut on Friday, ultimately killing at least 27 people including himself in the one of the worst mass shootings in U.S. history. The 20-year-old gunman, identified by law enforcement sources as Adam Lanza, fired what witnesses described as dozens of shots at Sandy Hook Elementary School in Newtown, Connecticut, which serves children from ages 5 to 10.
Candles commemorating victims of a Connecticut elementary school shooting burn during a vigil in Oakland, California, December 14, 2012. Twenty schoolchildren were slaughtered by a heavily armed gunman who opened fire at a suburban elementary school in Connecticut on Friday, ultimately killing at least 27 people including himself in the one of the worst mass shootings in U.S. history. The 20-year-old gunman, identified by law enforcement sources as Adam Lanza, fired what witnesses described as dozens of shots at Sandy Hook Elementary School in Newtown, Connecticut, which serves children from ages 5 to 10.
Andrew Jacobs (L) prays as his twin brother Matthew Jacobs (C) looks on outside Saint Rose of Lima Roman Catholic Church near Sandy Hook Elementary School, where a gunman opened fire on school children and staff in Newtown, Connecticut December 14, 2012. A heavily armed gunman opened fire on school children and staff at a Connecticut elementary school on Friday, killing at least 28 people, including 20 children, in the latest in a series of shooting rampages that have tormented the United States this year.
Andrew Jacobs (L) prays as his twin brother Matthew Jacobs (C) looks on outside Saint Rose of Lima Roman Catholic Church near Sandy Hook Elementary School, where a gunman opened fire on school children and staff in Newtown, Connecticut December 14, 2012. A heavily armed gunman opened fire on school children and staff at a Connecticut elementary school on Friday, killing at least 28 people, including 20 children, in the latest in a series of shooting rampages that have tormented the United States this year.
Two men pray at Saint Rose of Lima Roman Catholic Church near Sandy Hook Elementary School, where a gunman opened fire on school children and staff in Newtown, Connecticut December 14, 2012. Twenty schoolchildren were slaughtered by a heavily armed gunman who opened fire at a suburban elementary school in Connecticut on Friday, ultimately killing at least 27 people including himself in the one of the worst mass shootings in US history.
Two men pray at Saint Rose of Lima Roman Catholic Church near Sandy Hook Elementary School, where a gunman opened fire on school children and staff in Newtown, Connecticut December 14, 2012. Twenty schoolchildren were slaughtered by a heavily armed gunman who opened fire at a suburban elementary school in Connecticut on Friday, ultimately killing at least 27 people including himself in the one of the worst mass shootings in US history.
A woman attends a vigil service at the St Rose of Lima Roman Catholic Church for victims of the Sandy Hook Elementary School shooting in Newtown, Connecticut, December 14, 2012.
A woman attends a vigil service at the St Rose of Lima Roman Catholic Church for victims of the Sandy Hook Elementary School shooting in Newtown, Connecticut, December 14, 2012.
A woman prays at Saint Rose of Lima Roman Catholic Church near Sandy Hook Elementary School, where a gunman opened fire on school children and staff in Newtown, Connecticut December 14, 2012. Twenty schoolchildren were slaughtered by a heavily armed gunman who opened fire at a suburban elementary school in Connecticut on Friday, ultimately killing at least 27 people including himself in the one of the worst mass shootings in US history.
A woman prays at Saint Rose of Lima Roman Catholic Church near Sandy Hook Elementary School, where a gunman opened fire on school children and staff in Newtown, Connecticut December 14, 2012. Twenty schoolchildren were slaughtered by a heavily armed gunman who opened fire at a suburban elementary school in Connecticut on Friday, ultimately killing at least 27 people including himself in the one of the worst mass shootings in US history.
A rose is tied to a cross next to candles outside Saint Rose of Lima Roman Catholic Church near Sandy Hook Elementary School, where a gunman opened fire on school children and staff in Newtown, Connecticut December 14, 2012. A heavily armed gunman opened fire on school children and staff at a Connecticut elementary school on Friday, killing at least 28 people, including 20 children, in the latest in a series of shooting rampages that have tormented the United States this year.
A rose is tied to a cross next to candles outside Saint Rose of Lima Roman Catholic Church near Sandy Hook Elementary School, where a gunman opened fire on school children and staff in Newtown, Connecticut December 14, 2012. A heavily armed gunman opened fire on school children and staff at a Connecticut elementary school on Friday, killing at least 28 people, including 20 children, in the latest in a series of shooting rampages that have tormented the United States this year.
The families of victims grieve near Sandy Hook Elementary School, were a gunman opened fire on school children and staff in Newtown, Connecticut on December 14, 2012. A heavily armed gunman opened fire on school children and staff at a Connecticut elementary school on Friday, killing at least 26 people, including 20 children, in the latest in a series of shooting rampages that have tormented the United States this year.
The families of victims grieve near Sandy Hook Elementary School, were a gunman opened fire on school children and staff in Newtown, Connecticut on December 14, 2012. A heavily armed gunman opened fire on school children and staff at a Connecticut elementary school on Friday, killing at least 26 people, including 20 children, in the latest in a series of shooting rampages that have tormented the United States this year.
FILE PHOTO: A boy weeps as he is told what happened after being picked up at Reed Intermediate School following a shooting at Sandy Hook Elementary School in Newtown, Connecticut.
FILE PHOTO: A boy weeps as he is told what happened after being picked up at Reed Intermediate School following a shooting at Sandy Hook Elementary School in Newtown, Connecticut.

Twenty schoolchildren were slaughtered by a heavily armed gunman who opened fire at a suburban elementary school in Connecticut on Friday, ultimately killing at least 27 people including himself in the one of the worst mass shootings in US history.