english: It's a picture of the first beam particle going all the way around the LHC, colliding with a piece of the LHC deliberately, and showering particles into the detector.
non_english: Je to obrázok prvého lúču častíc, korý prešiel celý okruh v LHC, úmyselne sa zrazil s kúskom LHC, a častice dopadli do detektoru.