The Joint Base Charleston C-17 demonstration team explains the workings of the C-17 aircraft to Air Force JROTC students, April 6, 2011 at Stall High School, S.C. The three-man team will demonstrate the capabilities of the C-17 during the 2011 Air Expo on Joint Base Charleston, April 9, 2011. (U.S. Air Force photo/Senior Airman Timothy Taylor)

Lt. Col. Mike Phillips adjusts a life vest on freshman, Cody Frakes during a school visit to Ashley Ridge High School, April 5. Colonel Phillips is a part of the Air Mobility Command Demonstration team scheduled to perform at the 2011 Air Expo, April 8. Colonel Phillips and his team went to Ashley Ridge High School to explain their jobs to 9th and 10th grade Air Force JROTC students. Colonel Phillips is a C-17 pilot with the 16th Airlift Squadron on Joint Base Charleston, S.C. (U.S. Air Force photo/ Staff Sgt. Nicole Mickle) (Released)