Performers in their Halloween costumes, entertain trick or treaters on the north lawn of the White House during the Halloween celebrations, Saturday, Oct. 31, 2009, in Washington. President Barack Obama and first lady Michelle Obama on Saturday doled out presidential M&Ms and dried fruit mixes to more than 2,000 trick-or-treaters, marking their Halloween at a White House event partly aimed at honoring military families. (AP Photo/Manuel Balce Ceneta) Read the full article »