Over the next 24 hours, beams of protons should collide in the Large Hadron Collider (LHC) at the record-breaking energy of 13 teraelectronvolts (TeV) for the first time. This is one of the many steps required to prepare the machine before the LHC's second physics run can begin. The LHC Operations team plans to declare "stable beams" in the coming weeks – the signal for the LHC experiments to start taking physics data at this new energy frontier.