The annual 24-hour Le Mans is underway, as of 9AM ET this morning. The endurance race is the world's oldest active racing event — it started in 1923 — making this its 92nd year in existence. Drivers must be able to determine how much neck-breaking speed their cars can take before suffering the kind of mechanical troubles that would make a 24-hour race impossible. They'll race on the Circuit de la Sarthe in Le Mans, France.
Each team has three drivers, each of whom must race for a total of at least four hours over the course of the race. Drivers cannot drive for more than four hours inside a six-hour period. Over on YouTube, you can toggle through several onboard cameras and a pit cam. Drivers will race through the night, with a finish time of 9AM ET Sunday.