Filipino Marines and US Marines from the 13th Marine Expeditionary Unit BOXER Amphibious Ready Group based in Okinawa, Japan drop off from a CH-53 Super Stallion helicopter during a joint military exercise called Philippines-U.S. Amphibious Landing Exercise (PHIBLEX) in Ternate, Cavite province, southern Philippines on Friday, Sept. 20, 2013.Aaron Favila/The Associated Press