NAVAL STATION ROTA, Spain (Feb. 6, 2015) Engineering Aide Constructionman Christina Shelton assigned to Naval Mobile Construction Battalion (NMCB) 11 takes elevation readings during the improvements of the helicopter landing zone access road. The helicopter landing zone project, once finished will assist in the bilateral training with the Spanish military, explosive ordnance disposal and not interfere with the main airstrip of Naval Station Rota. (U.S. Navy photo by Mass Communication Specialist 1st Class Michael C. Barton/ Released)