February 20, 2013 6:26 am Heartbroken Leaders Demand Action Six teens in Prince George’s County have been killed since the start of the school year, and leaders say violence is at a tipping point. Local 1:37 Pro-Palestinian protesters gather outside White House correspondents' dinner 0:43 American University locked down before man arrested on campus 3:08 Family holds memorial for brothers, 3 and 6, who died after Clifton house fire 2:05 ‘People immediately hit the ground': 6 hurt in shooting outside DC nightclub 2:20 Driver accused of deadly hit and run of skateboarder held without bail