From the coverage, he was placing additional air bottles along the route. I can see how, being reminded of the logistic time cost of every bottle, he might hav

From the coverage, he was placing additional air bottles along the route. I can see how, being reminded of the logistic time cost of every bottle, he might have pushed and run too close for his return. And that's not even broaching equipment malfunctions. Things happen. Maybe it was a mistake and maybe it was bad luck. But the man's a hero for returning from retirement to play a critical role in saving 13 people.