WASHINGTON - OCTOBER 31:   Press Secretary Robert Gibbs dressed as Darth Vader and son Ethan dressed as Boba Fett in the east room greets parents, trick-or-treaters and local school children at the White House during a Halloween celebration on October 31, 2009 in Washington, DC. The Obamas are celebrating their first Halloween in the White House by inviting students and military families over for the holiday. Getty Images logo Getty Images 3 weeks ago

WASHINGTON - OCTOBER 31: Press Secretary Robert Gibbs dressed as Darth Vader and son Ethan dressed as Boba Fett in the east room greets parents, trick-or-treaters and local school children at the White House during a Halloween celebration on October 31, 2009 in Washington, DC. The Obamas are celebrating their first Halloween in the White House by inviting students and military families over for the holiday.