U.S. Army Maj. Lewis Long, an entomologist with the U.S. Army Public Health Command Pacific, Camp Zama, Japan, discusses types of traps used to catch mosquitoes tested for vector-borne diseases during a subject matter exchange part of Pacific Angel (PACANGEL) 17-2 in Tam Ky, Vietnam, Sept. 6, 2017. Now entering its 10th year, Operation PACANGEL ensures that the region’s militaries are prepared to work together to address humanitarian crises. (U.S. Air Force photo/1Lt Kellie Rizer)