http://home.web.cern.ch/about/updates/2015/05/first-images-collisions-13-tev
Last night, protons collided in the Large Hadron Collider (LHC) at the record-breaking energy of 13 teraelectronvolts (TeV) for the first time. These test collisions were to set up systems that protect the machine and detectors from particles that stray from the edges of the beam.