The pilot in Falcon One opted to check it out himself, instructing his wingman to remain in the patrol area until he was relieved. Even as he was giving the instructions, the F-16 pilot was changing course and lining up an intercept on the small plane, which was just heading over the Hudson River south of the Tappan Zee Bridge.

“It is what they say it is,” Howe told Falcon One, checking the contact with the AMV radar. He was too far to see if there was a bomb aboard. “Nothing else there.”

“Falcon One.”

Howe checked his position, orienting himself in the night sky as he flew westward, tracking over New Jersey as he flew toward the light plane. The police had already been alerted to check all of the airports in the area that might be used to launch the UAV. Vehicle-based installations of Stinger missiles were guarding the main power plants in the area, and a separate F-16 flight was over Indian Point, the nuclear power station along the Hudson up near Peekskill, fifty-something miles north of New York City.

Everything was covered. Except what they didn’t expect.

And what would that be?

A light plane reconfigured to hold a bomb?

The civilian pilot was answering the F-16’s radio call.

If Howe had the UAV, he’d set it up in a barn somewhere north of the city, one that had an open field for it to climb through after the rocket engines ignited. When the time came, he’d pull open the big doors and fire away.

Something flashed in the sky ahead. Howe’s breath caught in his chest as his brain tried to make sense of what his eyes had just seen.

Chapter 4

Fisher stood on the A train platform, hands on hips. Six National Guardsmen with M16s and bulletproof vests watched from the stairs behind him; another knot of men patrolled both sides of the long platform, which sat between the north- and southbound tracks.

NYPD had already considered the problem of trains coming into Penn Station, which sat below the Madison Square Garden area, and posted details to search the trains before they got to the station. The job was not as difficult as might be imagined: Relatively few trains were inbound to the station at this time of day, and their progress could be easily tracked.

The subway was a somewhat different matter, though here, too, the police seemed to have corralled the problem. The stations on Thirty-fourth street -not just at Eighth and Seventh Avenues but Herald Square on Sixth as well-were closed. Trains were permitted to run through on the lines but there was no stopping.

“What’s going to happen?” Kowalski asked Fisher, joining him on the platform. “They pack the train with the gas, then arrange to set off the E-bomb when it’s in the station?”

Fisher didn’t answer. A light lit the tunnel at the far end. The platform vibrated with a low rumble as the A train approached. The noise of the train’s steel wheels grinding against the rails crescendoed into a loud smack of rolling thunder as the train sped through the station. Fisher saw that there were armed policemen and Guardsmen in each car.

“Maybe we should have them just shut down the trains,” said Kowalski after the train passed. “You think? We can. We’ve arranged it.”

“Not necessary,” said Fisher. He went over to the edge of the tracks. “Okay.”

“Okay what? Stop the trains?”

“Nah. That’ll tip them off.”

“But-”

Fisher jumped down onto the tracks.

“Jesus, Andy, are you out of your mind?” yelled Kowalski. “That’s a live track. You touch that third rail and you fry.”

“You coming?”

“No fucking way.”

“Your call. Tell Macklin to meet me inside Madison Square Garden.”

“Inside where?”

“If I knew, I wouldn’t have to go this way, right?”

Chapter 5

There was no reading on the radar. The flash had come from the ground well in the distance. Howe hit the magnifier command, confirmed that it was clean, and then went quickly to the infrared screen, even though the computer should have already used the sensor to compile its “read.”

Nothing.

So what had he seen?

He nudged his left wing down, sliding the Iron Hawk into an orbit over the spot where he had seen the spark of light. All he could think of was the flash of a rocket-or the UAV-taking off.

The F-16 pilots were talking about the light plane. Howe ignored them, pushing against his restraints. He had to find the stinking thing: He had to see it so he could shoot it down.

Or, rather, tell the others to shoot it down.

“Iron Hawk, this is Falcon Two.”

Was that it, the blur at the right side of his windscreen?

The smudge disintegrated into a shadow. Howe started tacking south and then saw lights on the ground, red lights…

A fire?

With that much of a spark?

He eased back even more on the throttle. The Iron Hawk practically walked over the spot: The gear said the plane was doing only 120 knots at 3,000 feet.

A fire truck. Several fire trucks.

Something shot into the sky.

A gas station was on fire.