U.S. Air Force maintenance crew members with the 159th Aircraft Maintenance Squadron, Louisiana Air National Guard and Singapore Air Force maintenance crew members participating in Cope Tiger 14 discuss each military's F-15 Eagle aircraft airframes on the flight line at Korat Royal Thai Air Force Base, Thailand, March 12, 2014. Cope Tiger is an annual multilateral aerial exercise designed to improve readiness and cooperation between U.S., Thai and Singaporean forces.