<span>A V-22 Osprey helicopter carrying American troops land on a port in Casiguran, Aurora province, prior to a simulated typhoon relief operations with their Filipino counterparts under the annual Balikatan exercises, dubbed Civil MIlitary Activities from  the Sea, May 15, 2017.</span>
<span>Members of the U.S. Army National Guard demonstrate their rappelling skills during the Urban Search and Rescue activity of the 2016 RP-U.S. Balikatan joint military exercises in Camp Capinpin in Tanay, Rizal, April 8, 2016. </span>
<span>A cow walks past Philippine Marines as they attack a mock enemy target during the Philippine-US joint naval training exercise at the Philippine Naval Station in San Antonio, Zambales, 9 October 2015.</span>
<span>Philippine and US Marine troops simulate a boat raid by using a Riverine Utility Craft during joint military exercises at Marine Base Gregorio Lim in Ternate, Cavite on Thursday, October 8, 2015. The Philippine and US Marine Corps are conducting various drills on artilery operations, special operations, combined arms training, command exercises, base defense and amphibious operations.</span>
<span>A US A-10 Thunderbolt II during the live fire exercise as part of the 2015 RP-US Balikatan military exercitse at Crow Valley, Capas, Tarlac, April 30, 2015.</span>
<span>US Marines storm a beach along the West Philippine Sea on May 9, 2015 but only to simulate an amphibious landing during joint US-Philippines military exercises dubbed Balikatan 2014 at San Antonio, Zambales. This year's war games focus on maritime security.</span>