U.S. Air Force Capt. David Foster with the 535th Airlift squadron conducts a preflight check on a C-17 Globemaster III during exercise Balikatan 2016, Clark Air Filed, Philippines, April 15, 2016. Balikatan, which means shoulder to shoulder in Filipino, is an annual bilateral training exercise aimed at improving the ability of Philippine and U.S. military forces to work together during planning, contingency and humanitarian assistance and disaster relief operations. (U.S. Air National Guard photo by Tech. Sgt. Andrew Jackson/released)