By the time he had reached the highway, the jet dispatcher had come back on the line and let him know that a pilot was en route to Boeing Field. The jet was being fueled. It would be in the air promptly and would probably get to Missoula before Corvallis did.

During the ensuing hour-long drive down the Bitterroot Valley, he mostly resisted the temptation to look at the screen, and instead listened to the radio. This was jammed with emergency coverage, as alarming as it was vague. One would think it would be an easy matter to simply go to Moab and look at it and report back. But all helicopters within an hour’s flying time of ground zero had already been spoken for by mysterious entities, and pilots were being warned not to fly anywhere near Moab for fear of radioactive contamination. Much of the radio coverage simply consisted of reporters summarizing what was turning up on the Miasma. Pictures of military roadblocks were being massively upvoted on discussion forums. Comment-thread geeks were zooming in on details and pegging various items of equipment: radiation detectors, dosimeters, containers of pills you were supposed to swallow in the event of radiation exposure. From time to time they would cut away to the financial desk for a report on the inevitable stock market crash. Trading on the New York Stock Exchange was already suspended for the day. Foreign leaders were expressing grave concern and offering assistance. A jihadist website had apparently posted a video describing the annihilation of Moab as a warning shot, and making it known that they had another such weapon planted in a major American city.

By the time Corvallis reached the outskirts of Missoula, that passenger at LAX had sold his mushroom cloud footage to the highest-bidding network. While stopped at a red light, Corvallis watched it on the dashboard video. It had been taken from hundreds of miles away, so was pretty small in the original clip; the network had zoomed it in (“blown it up,” in the inartful phrase of an anchorwoman) and enhanced it.

They did not get to savor the exclusive for long. By the time Corvallis had reached the airport, another network had come through with even better imagery from a truck driver’s dashboard camera. Apparently the driver, having witnessed the mushroom cloud from twenty miles outside of Moab, had turned his vehicle around and driven back out to the next town where he could get Internet access.