June 13, 2012 7:44 pm Pop Warner's New Plan to Prevent Concussions The nation’s biggest youth football organization releases new guidelines designed to prevent concussions. News4’s Jim Rosenfield reports. Local 2:15 Veteran of wars in Iraq, Afghanistan killed in Laurel hit-and-run 3:28 Social media and teens' mental health: A psychiatrist weighs in 1:41 DC-area police ramp up traffic enforcement in pedestrian safety campaign 3:05 ‘We need real liberation': George Washington University pro-Palestinian protest enters fifth day 2:17 GW asks to students to move pro-Palestinian demonstration