 However, the El Centro site had to be abandoned after a wayward V-2 missile from White Sands crashed into a cemetery in Juarez, Mexico, leading to then Mexican President Miguel Alemán Valdés refusing to allow missiles to overfly Baja.The Navy transferred the Air Station to the Air Force on September 1, 1948, and it remained on standby status.On May 11, 1949, President Truman signed Public Law 60 which established the Joint Long Range Proving Ground.