British PM Cameron Visits the White House in Washington

U.S. President Barack Obama, British Prime Minister David Cameron, U.S. First Lady Michelle Obama and Samantha Cameron (R-L) wave from the balcony of the White House during in an official arrival ceremony on the South Lawn of the White House In Washington DC on March 14, 2012. Cameron is on a three-day visit to the United States. UPI/Pat Benic..