Washington Photo Blog: Monday, Apr. 12, 2010

U.S. Air Force personnel await the arrival of Felipe Calderon, President of Mexico, and his delegation on April 12, 2010 at Andrews Air Force Base in Maryland. two-day nuclear security summit
Brendan Hoffman / Getty Images

The Brass

U.S. Air Force personnel await the arrival of Felipe Calderon, President of Mexico, and his delegation on April 12, 2010 at Andrews Air Force Base in Maryland. Leaders from around the world are meeting in Washington this week for a two-day nuclear security summit convened by President Obama.

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