Electrician's Mate 2nd Class Timothy Willard (left) and Gunner's Mate 1st Class Ronnel Henry (right) stand watch aboard guided-missile destroyer USS Halsey (DDG 97) as Halsey departs Joint Base Pearl Harbor-Hickam to conduct training near Hawaii during exercise Koa Kai 14-1. Koa Kai is a semiannual exercise that improves cooperation, readiness and the capability of forces to respond quickly to various crises, ranging from armed conflict to humanitarian assistance. (Mass Communication Specialist 3rd Class Johans Chavarro/ RELEASED)