From: Sam Wormley on
LHC starts run at 7-TeV collisions

http://blogs.physicstoday.org/newspicks/2010/03/lhc-starts-run-at-7-tev-collis.html?type=PTFAVE

Physics Today: CERN's Large Hadron Collider has finally started
colliding two 3.5-TeV circulating beams of protons together to produce
7-TeV collisions and the official start of the LHC research program.