If you want to run into some celebs, head on over to the runway at the Washington Dulles International Airport. “Sin City” star Rosario Dawson flew in Thursday morning, while “White Chicks” star Marlon Wayans, “American Pie’s” Jason Biggs, “Two and a Half Men” actor Angus Jones and “House” hunk Omar Epps arrived Wednesday evening. They are all in town for the White House Correspondents’ Association Dinner on Saturday night. We’ll keep you posted on where they party.