Sebastian Pinera, President of Chile, is greeted by the Assistant Chief of Protocol for Diplomatic Affairs for the U.S. State Department, Gladys Boluda, and Col. Steven Shepro, 316th Wing/Joint Base Andrews commander, on the flight line at Joint Base Andrews, Md., April 11, 2010. The 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 Staff Sgt. Renae Saylock).