Bechtel has been contracted to manage the United States Navy's nuclear propulsion research facilities since 2011.[1] In June 2013 the unit completed design and construction on a U.S. Missile Defense Agency project at Fort Greely, Alaska, which included three missile fields and forty silos.[181] In 2014 the U.K. Ministry of Defence selected Bechtel to support the Royal Navy and Air Force on procurement and managed support services.[182] Additionally, in 2016, Bechtel began providing testing and operations for the Arnold Engineering Development Complex at the Arnold Air Force Base in Tennessee.[183]