Part of the Linac 4 booster at CERN, as seen on May 9 in Meyrin, near Geneva. The booster will allow the LHC to reach higher luminosity in the next few years.
Fabrice Coffrini/AFP/Getty Images
The Control Centre of the Large Hadron Collider (LHC) at the European Organisation for Nuclear Research (CERN) in Prevessin near Geneva. The LHC has been turned on for the first time after two years of upgrades.