President Obama waves after speaking at a UPS facility in Las Vegas on Thursday. Nevada is one stop on the president's latest road trip focusing on the economy. Julie Jacobson/AP hide caption

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President Obama tours Conveyor Engineering and Manufacturing in Cedar Rapids, Iowa, on Wednesday. Jewel Samad/AFP/Getty Images hide caption

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President Obama and Chancellor Angela Merkel during the official arrival ceremony for the German leader at the White House this morning (June 7, 2011). Jewel Samad /AFP/Getty Images hide caption

itoggle caption Jewel Samad /AFP/Getty Images

President Obama, accompanied by Commons Speaker John Bercow and Lords Speaker Baroness Helen Hayman, as he entered Westminster Hall. Nicholas Kamm /AFP/Getty Images hide caption

itoggle caption Nicholas Kamm /AFP/Getty Images