Lt. Col. Martin Strittmatter, left, 108th Wing pilot, and his son, Nick, pose for a photo in front of the KC-135 Stratotanker after the air refueling mission April 2, 2014. Nick, a sophmore at St. Joseph's University in Philadelphia, Pa., was among the 25 Air Force ROTC cadets that were invited to observe the air refueling mission. (U.S. Air National Guard photo by Master Sgt. Mark C. Olsen/Released)