FILE - In this April 27, 2007, file photo, Virginia Tech student Caroline Merrey, 22, left, is comforted by her boyfriend Alec Supataraporn as they visit the memorial on the Virginia Te

 

              FILE - In this April 27, 2007, file photo, Virginia Tech student Caroline Merrey, 22, left, is comforted by her boyfriend Alec Supataraporn as they visit the memorial on the Virginia Te
FILE - In this April 27, 2007, file photo, Virginia Tech student Caroline Merrey, 22, left, is comforted by her boyfriend Alec Supataraporn as they visit the memorial on the Virginia Tech campus in Blacksburg, Va. Merrey jumped out of a window to avoid being shot while taking slain lecturer Liviu Librescu's class in the April 16 shooting on the campus. In recent years, America has had many scenes of mass shootings. The campus of Virginia Tech University. A shopping center in Tucson, Ariz. A movie theater in Aurora, Colo. A temple in Oak Creek, Wisc. None put gun control back on the national agenda in a serious way. Then came the elementary school massacre in Newtown, Conn., after the election, and that all changed. Or so it seemed. (AP Photo/Jae C. Hong, File)