A spectacular panoramic look inside the Large Hadron Collider. The Compact Muon Solenoid (CMS) is one of two main detectors at the LHC. It weighs 12,500 tons, measures 69 ft. (21 m) in length and is a key research tool for 2,000 scientists hailing from 37 countries. It was built above ground and lowered into place—a sensible strategy for so massive a piece of hardware. Here it is seen in 2008, just before it was completed.