Master Sgt. Mark Sindiong, Air National Guard, Hickam Air Force Base, HI., KC-135 boom operator refuels F-15's from Kadena Air Base, Japan, and Royal Thai Air Force F-16's as part of the refueling phase of the Cope Tiger 2009 exercise at Korat Royal Thai Air Force Base, Thailand March 12. Cope Tiger is an annual exercise held in Thailand to improve combat readiness and combined and joint interoperability of U.S., Thai and Singaporean forces while enhancing regional security and providing humanitarian support. (U.S. Air Force photo/Staff Sgt. Angelique Perez)