February 29, 2012 6:40 pm Blaze That Injured Firefighters Was Intentionally Set Investigators now say arson is what sent seven Prince George’s County firefighters to the hospital after a blaze consumed a Riverdale, Md., home. Derrick Ward reports. Local 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 3:01 “It's 100% different”: Community reflects on emergency curfew at National Harbor