President of Mexico, Felipe Calderon, arrives at Joint Base Andrews, Md., April 12, 2010. The national delegate landed at Andrews on his way to the Nuclear Security Summit hosted by President Barack Obama in Washington, D.C., which is slated for Monday and Tuesday. The 316th Wing is leading operations to provide safe, effective and efficient arrival and departure services for the invited guests transiting Andrews. (U.S. Air Force photo by Tech. Sgt. Maritza Freeland).