Hall was frowning at the page, wondering what it meant, when the pilot said, "Dr. Hall?"

"Yes."

"We have just passed the last checkpoint, sir. We will touch down in four minutes."

"All right." Hall paused. "Do you know where, exactly, we are landing?"

"I believe," said the pilot, "that it is Flatrock, Nevada."

"I see," Hall said.

A few minutes later, the flaps went down, and he heard a whine as the airplane slowed.

Nevada was the ideal site for Wildfire. The Silver State ranks seventh in size, but forty-ninth in population; it is the least-dense state in the Union after Alaska. Particularly when one considers that 85 per cent of the state's 440,000 people live in Las Vegas, Reno, or Carson City, the population density of 1.2 persons per square mile seems well suited for projects such as Wildfire, and indeed many have been located there.

Along with the famous atomic site at Vinton Flats, there is the Ultra-Energy Test Station at Martindale, and the Air Force Medivator Unit near Los Gados. Most of these facilities are in the southern triangle of the state, having been located there in the days before Las Vegas swelled to receive twenty million visitors a year. More recently, government test stations have been located in the northwest corner of Nevada, which is still relatively isolated. Pentagon classified lists include five new installations in that area; the nature of each is unknown.

10. Stage I

HALL LANDED SHORTLY AFTER NOON, the hottest part of the day. The sun beat down from a pale, cloudless sky and the airfield asphalt was soft under his feet as he walked from the airplane to the small quonset hut at the edge of the runway. Feeling his feet sink into the surface, Hall thought that the airfield must have been designed primarily for night use; at night it would be cold, the asphalt solid.

The quonset hut was cooled by two massive, grumbling air conditioners. It was furnished sparsely: a card table in one corner, at which two pilots sat, playing poker and drinking coffee. A guard in the corner was making a telephone call; he had a machine gun slung over his shoulder. He did not look up as Hall entered.

There was a coffee machine near the telephone. Hall went over with his pilot and they each poured a cup. Hall took a sip and said, "Where's the town, anyway? I didn't see it as we were coming in."

"Don't know, sir."

"Have you been here before?"

"No sir. It's not on the standard runs."

"Well, what exactly does this airfield serve?"

At that moment, Leavitt strode in and beckoned to Hall. The bacteriologist led him through the back of the quonset and then out into the heat again, to a light-blue Falcon sedan parked in the rear. There were no identifying marks of any kind on the car; there was no driver. Leavitt slipped behind the wheel and motioned for Hall to get in.