Tennessee school bus loaded with children catches on fire

The terrifying moments caught on camera. A school bus totally up in flames. Thick black smoke shooting up.The children on board escaping just moments earlier. >> Highway 29 east. It's going to be a school bus on fire.All the children are off. >> NBC News obtaining video of the dramatic inferno as well as these images showing first responders extinguishing the blaze. Miguel Henry, a former bus driver himself, recording the video on his way to work and went to lend a hand.>> As soon as he saw the smoke, I bel ...