Check Out This Super-Cool Quad Video of the Falcon Re-Entry. Two Sonic Booms!

Elon Musk has posted a four-panel video of the Falcon re-entry on his Twitter feed and it’s driving even jaded space-watchers into a frenzy. With all of SpaceX’s success, it’s easy to forget what a long road it’s been to get to this point. Remember in 2001 when Musk wanted to send experimental greenhouses to …