wearing a respirator mask during repairs to the leaky coolant system.
Mir|alt=A man holding a piece of hose floats in front of a selection of transient space station hardware. He is wearing a gray-and-yellow plastic mask over his mouth and nose, a pair of goggles above his eyes, and a blue jumpsuit with a name patch on it. On February 24, 1997 a
backup solid-fuel oxygen canister caught fire in the
Kvant-1 module. The fire spewed molten metal, and the crew was concerned that it could melt through the hull of the space station. Smoke filled the station, and the crew donned respirators to continue breathing, although some respirators were faulty and did not supply oxygen. After burning for fourteen minutes and using up three fire extinguishers, the fire died out. The smoke remained thick for forty-five minutes after the fire was extinguished. After the respirators ran out of oxygen and the smoke began to clear the crew switched to using filter masks. ==Collision==