Gravitational waves are the result of black holes colliding, they are waves that stretch and contract the edges of the universe. LIGO can sense the contraction of the edge of the universe using lasers and mirrors. This technology can be used to locate things or track things that may or may not be ethical depending on the hands they are in. Landsat is a satellite imagery program, If it is developed too much it could be used to spy on people at anytime. There are a lot of ethical dilemmas with sovereignty and surveillance. If we can sense people with long range lasers then what other things can be developed from it?