High Altitude Water Cherenkov observatory tests speed of light
(PHYSorg.com Physics)

New measurements confirm, to the highest energies yet explored, that the laws of physics hold no matter where you are or how fast you`re moving. Observations of record-breaking gamma rays prove the robustness of Lorentz Invariance-a piece of Einstein`s theory of relativity that predicts the speed of light is constant everywhere in the universe. The High Altitude Water Cherenkov observatory in Puebla, Mexico detected the gamma rays coming from distant galactic sources.