** FILE ** A bullet is positioned in front of Springettsbury, Pa., Police Chief Thomas Hyers at Girard College in Philadelphia, Monday, Feb. 11, 2013, after a roundtable discussion on gun control with Vice President Joseph R. Biden and other elected and law enforcement officials. (AP Photo/Matt Rourke)

Photo by: Matt Rourke

** FILE ** A bullet is positioned in front of Springettsbury, Pa., Police Chief Thomas Hyers at Girard College in Philadelphia, Monday, Feb. 11, 2013, after a roundtable discussion on gun control with Vice President Joseph R. Biden and other elected and law enforcement officials. (AP Photo/Matt Rourke)