US President Barack Obama (L) and First Lady Michelle (R) greet trick or treaters on the north portico of the White House in Washington, D.C., USA, 31 October 2009. The President and First lady invited over two thousand local school children to take part in the festivities that includes performers and Halloween themed decorations. EPA/KRISTOFFER TRIPPLAAR - POOL
US President Barack Obama greets trick or treaters on the north portico of the White House in Washington, D.C., USA, 31 October 2009. The President and First lady Michelle invited over two thousand local school children to take part in the festivities that includes performers and Halloween themed decorations. EPA/KRISTOFFER TRIPPLAAR - POOL
Trick or treaters wait to be greeted by US President Barack Obama and First Lady Michelle (both not pictured) in the east room of the White House in Washington, D.C., USA, 31 October 2009. The President and First lady invited over two thousand local school children to take part in the festivities that includes performers and Halloween themed decorations. EPA/KRISTOFFER TRIPPLAAR - POOL
Press Secretary Robert Gibbs dressed as Darth Vader waits for US President Barack Obama and First Lady Michelle (both not pictured) in the east room of the White House in Washington, D.C., USA, 31 October 2009. The President and First lady Michelle invited over two thousand local school children to take part in the festivities that includes performers and Halloween themed decorations. EPA/KRISTOFFER TRIPPLAAR - POOL
US President Barack Obama (R) and First Lady Michelle (L) greet trick or treaters on the north portico of the White House in Washington, D.C., USA, 31 October 2009. The President and First lady invited over two thousand local school children to take part in the festivities that includes performers and Halloween themed decorations. EPA/KRISTOFFER TRIPPLAAR - POOL
US President Barack Obama (L) and First Lady Michelle (R) greet trick or treaters on the north portico of the White House in Washington, D.C., USA, 31 October 2009. The President and First lady invited over two thousand local school children to take part in the festivities that includes performers and Halloween themed decorations. EPA/KRISTOFFER TRIPPLAAR - POOL
US First Lady Michelle Obama greets trick or treaters on the north portico of the White House in Washington, D.C., USA, 31 October 2009. US President Barack Obama and First lady invited over two thousand local school children to take part in the festivities that includes performers and Halloween themed decorations. EPA/KRISTOFFER TRIPPLAAR - POOL
US President Barack Obama (R) and First Lady Michelle (L) greet trick or treaters on the north portico of the White House in Washington, D.C., USA, 31 October 2009. The President and First lady invited over two thousand local school children to take part in the festivities that includes performers and Halloween themed decorations. EPA/KRISTOFFER TRIPPLAAR - POOL
US First Lady Michelle Obama greets trick or treaters on the north portico of the White House in Washington, D.C., USA, 31 October 2009. US President Barack Obama and First lady invited over two thousand local school children to take part in the festivities that includes performers and Halloween themed decorations. EPA/KRISTOFFER TRIPPLAAR - POOL
US President Barack Obama (R) and First Lady Michelle (L) greet trick or treaters on the north portico of the White House in Washington, D.C., USA, 31 October 2009. The President and First lady invited over two thousand local school children to take part in the festivities that includes performers and Halloween themed decorations. EPA/KRISTOFFER TRIPPLAAR - POOL
US President Barack Obama (C) and First Lady Michelle (L) greet trick or treaters on the north portico of the White House in Washington, D.C., USA, 31 October 2009. The President and First lady invited over two thousand local school children to take part in the festivities that includes performers and Halloween themed decorations. EPA/KRISTOFFER TRIPPLAAR - POOL
US President Barack Obama (R) and First Lady Michelle (L) greet trick or treaters on the north portico of the White House in Washington, D.C., USA, 31 October 2009. The President and First lady invited over two thousand local school children to take part in the festivities that includes performers and Halloween themed decorations. EPA/KRISTOFFER TRIPPLAAR - POOL
US President Barack Obama (C-R) and First Lady Michelle (C-L) greet trick or treaters on the north portico of the White House in Washington, D.C., USA, 31 October 2009. The President and First lady invited over two thousand local school children to take part in the festivities that includes performers and Halloween themed decorations. EPA/KRISTOFFER TRIPPLAAR - POOL
US President Barack Obama (R, partly hidden) and First Lady Michelle (L) greet trick or treaters on the north portico of the White House in Washington, D.C., USA, 31 October 2009. The President and First lady invited over two thousand local school children to take part in the festivities that includes performers and Halloween themed decorations. EPA/KRISTOFFER TRIPPLAAR - POOL
