Under federal regulations, miners are supposed to visually inspect oxygen packs to see whether the color-coded indicator shows that they are functioning properly.

The violation was for failing keep proper records of inspections of the mine's oxygen packs.

It would mandate more oxygen packs in mines and the construction of safe chambers where miners could go if the exits were blocked in an emergency.

The climb of the 28,250-foot peak was accomplished by an American team in 1938, before mountaineers had oxygen packs to ease their ordeal.

Sorahl hesitated for a heartbeat before reaching down two oxygen packs and handing one to his mother.

Rescuers decended into the mine wearing oxygen packs and stayed below only for short periods, Miss Meyer said.

We could put an officer on shore in any of those places, rowing in a dinghy, working with an oxygen pack on his back.

Cargraves nodded, and turned his attention to Morrie's oxygen pack.

'Well, none of your machines has come to look us up yet,' Dale said, as he adjusted the oxygen pack over his shoulder blades.

Each miner was allotted an oxygen pack, but the pack only guaranteed the miners six hours of oxygen.