UFO Sightings appear to have overcome gravity based on their ability to maneuver, tremendous speed, and ability to launch into space. It takes an enormous amount of electrical energy to directly deform the gravity tidal force curvature field! Indeed it takes 4 billion tons of mass energy equivalents to make a 1-fermi change in the local radius of curvature! Measurements of the power coming from some UFOs indicate they have the electrical energy equivalent to a power plant that would provide electrical power for a small city. UFO Sightings are frequently seen hovering above power lines, power plants and electrical thunderstorms. We can speculate they use the electrical energy to overcome gravity.