President Obama welcomes UK Prime Minister David Cameron to the White House in Washington

From left to right, Treasury Secretary Tim Geithner, Secretary of State Hillary Clinton, Jill Biden, and Vice President Joe Biden wait for the arrival of the Prime Minister of the United Kingdom David Cameron and his wife Samantha during and official arrival ceremony on the South Lawn of the White House in Washington, D.C. on March 14, 2012. UPI/Kevin Dietsch