US navy personnel (R) observe their Philippine counterparts during live firing of M60 machine guns at the naval base in Sangley point, Cavite City, west of Manila on June 28, 2013, as part of the Cooperation Afloat Readiness and Training (CARAT) exercises. The six-day exercises involving three US Navy vessels, including the USS Fitzgerald, a guided missile destroyer are an annual event but this year they will be held off the west coast of the Philippines’ main island of Luzon, close to Scarborough Shoal which China insists it owns. AFP PHOTO/TED ALJIBE