However, a U.S. military electronic warfare exercise likely contributed to the crash of a midnight medevac flight in May. With a crew disoriented by the loss of GPS, a Beechcraft King Air crashed into the side of a mountain in New Mexico while flying to pick up a patient. Roughly 100 miles west of the crash, the U.S. Air Force was conducting NAVFEST at the White Sands Missile Range. The annual multi-week electronic warfare exercise tests the use and disruption of different types of navigation systems, and trains military personnel in GPS-denied environments. There was obviously flying before GPS, but the King Air's pilots were relatively inexperienced when they took off for Roswell.