High Quality Content by WIKIPEDIA articles! Air Test and Evaluation Squadron 31 (VX-31) is a U.S. Navy air test and evaluation squadron based at Naval Air Weapons Station China Lake, California. Known by their nickname of the "Dust Devils", their aircraft tail code is DD and they fly numerous USN and USMC aircraft and helicopters.Naval Air Weapons Station China Lake or NAWS China Lake (ICAO: KNID, FAA LID: NID) is an airborne weapons testing and training range operated by the United States Navy and its contractors. It is located in the northeast of California's Mojave Desert in northwestern San Bernardino County, southwestern Inyo County, and northeastern Kern County, adjacent to Ridgecrest, California.