He peeled back a marker and let it fall. Air currents whisked it away and plastered it against a riveted seam of the dome. It pulsed as though it were breathing and then it ruptured.

Major Winship moved quickly to cut out the emergency air supply which had cut in automatically with the pressure drop. "You guys wait. It's on your right side, midway up. I'll try to sheet it."

He moved for the plastic sheeting.

"We've lost about three feet of calk out here," Capt. Lawler said. "I can see more ripping loose. You're losing pressure fast at this rate."

Major Winship pressed the sheeting over the leak. "How's that?"

"Not yet."

"I don't think I've got enough pressure left to hold it, now. It's sprung a little, and I can't get it to conform over the rivet heads."

There was a splatter of static.

"Damn!" Major Winship said, "they should have made these things more flexible."

"Still coming out."