S1 E1: A Year in Space | Extended Trailer

Aired: 3/1/2016 | 0:03:09 | Promotion
Follow astronaut Scott Kelly’s record-breaking 12-month mission on the International Space Station, from launch to landing, as NASA charts the effects of long-duration spaceflight by comparing him to his identical twin on Earth, astronaut Mark Kelly. Landing Wednesday, March 2 at 8/7c.