Last night (California time), Nike and three runners attempted to break the two-hour marathon on a course and a team tailored for the task. One runner almmost did it, Kenyan Eliud Kipchoge. It was super fun to watch it as it happened. The world record to break is 2:02:57. I was not aware that he was falling behind pace, but he finished with 2:00:24. Nike stated that this would not count for a world record, probably due to this being a controlled course.
Take a look at the video above or read the excellent FiveThirtyEight article here. If you only want to see the end of the run, tune in around 2 hours 40 minutes.