A passenger onboard the plane that crashed Thursday morning, killing former NASCAR driver Greg Biffle, texted a family member before the tragedy. NBC's Sam Brock reports on the latest details.

Explaining on Instagram: "Follow (us) @Explaining to Learn something NEW every day 🧠💫 Buster Keaton performed one of his most nerve-wracking stunts by standing directly in front of a moving train and calmly clearing debris off the tracks. 🎬😳 In The General (1926), the train rolls toward him as he casually tosses railroad ties and obstacles aside at the last possible second. There were no special effects, no trick photography, and no safety backups. If he slipped or mistimed a move, the conse