NASA launched the Endeavour Space Shuttle on the penultimate space shuttle mission.
Mission STS-134′s primary objectives were to ferry several new modules to the International Space Station and install them. One of the key modules was the Alpha Magnetic Spectrometer 2, which investigated the origins of dark matter. The mission also carried 13 Lego kits to the ISS so the astronauts could see how the models acted in microgravity.