May 5, 2011 3:02 pm Authorities at Powell Elementary Police and Fire & EMS at Powell Elementary School, one of at least 12 schools that received suspicious letters Thursday. Local 2:03 PNC Parkway Classic marks 40 years of racing in Virginia 5:01 Strawberry Season: Pick fruit at this Virginia festival 0:40 Man stabbed to death near Audi Field in DC 1:37 Pro-Palestinian protesters gather outside White House correspondents' dinner 0:43 American University locked down before man arrested on campus