David and Francine Wheeler, parents of Sandy Hook Elementary School shooting victim Benjamin Wheeler, embrace during the gun violence conference in Danbury, Conn., on Thursday attended by Vice President Joseph R. Biden. Mr. Biden said politicians must speak for victims of gun violence who can no longer do so themselves. (Associated Press)
Vice President Joseph R. Biden speaks at a gun violence conference in Danbury, Conn., on Feb. 21, 2013. The conference, held near the Newtown where 26 lives were lost in the Sandy Hook Elementary School shooting, was organized by members of the state's congressional delegation is to push President Obama's gun control proposals. (Associated Press)
Vice President Joseph R. Biden speaks at a gun violence conference in Danbury, Conn., on Feb. 21, 2013. The conference, held near the Newtown where 26 lives were lost in the Sandy Hook Elementary School shooting, was organized by members of the state's congressional delegation is to push President Obama's gun control proposals. (Associated Press)
President Obama presents a 2012 Citizens Medal to Donna and Carlos Soto, the parents of slain Sandy Hook Elementary School teacher Victoria Soto, on Feb. 15, 2013, during a ceremony in the East Room of the White House. (Associated Press)
President Obama presents a 2012 Citizens Medal to Donna and Carlos Soto, the parents of slain Sandy Hook Elementary School teacher Victoria Soto, on Feb. 15, 2013, during a ceremony in the East Room of the White House. (Associated Press)
**FILE** A girl sits on a Newtown bus leaving the new Sandy Hook Elementary School after the first day of classes in Monroe, Conn., on Jan. 3, 2013. The Sandy Hook students started that day in their new school, formerly called Chalk Hill School in Monroe. It was renamed Sandy Hook Elementary and overhauled especially for the students from the Sandy Hook School shooting. (Associated Press)
** FILE ** A police officer leads two women and a child from Sandy Hook Elementary School in Newtown, Conn., on the day of the mass killings. (Newtown Bee via Associated Press)
Students from Sandy Hook Elementary School sing "America the Beautiful" before the NFL Super Bowl XLVII football game between the San Francisco 49ers and the Baltimore Ravens Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Charlie Riedel)
**FILE** Connecticut State Police are on scene following the mass shooting at the Sandy Hook Elementary School in Newtown, Conn., about 60 miles northeast of New York, on Dec. 14, 2012. (Associated Press)
