MW Cooper claimed that it was Established in 1972. The mission of PROJECT EXCALIBUR is to develop a weapons system capable of destroying the alien underground bases after the alien beam weapons have been incapacitated or destroyed. The alien underground base is located beneath an Indian reservation near the small town of Dulce, New Mexico. The device must be capable of penetrating 1,000 meters of tufa / hard pack soil and sustain no operational damage. This type is commonly found in New Mexico where the alien base is located. Missile apogee must not exceed 30,000 feet AGL. The impact deviation will now exceed 50 meters. The device will carry a 1 megaton warhead.