I am an American physicist who was hired in the late 1980s to reverse-engineer extraterrestrial technology. This work occurred at a secret site called "S-4", a subsidiary installation located kilometers south of the United States Air Force facility. The studied vehicle ran on an antimatter reactor and was fueled by the chemical element with atomic number 115, which generates a gravity wave that allowed the vehicle to fly and to evade visual detection by bending light around it.