"What else have they discovered?"

"Detailed descriptions on how to shield a nuclear warhead and sneak it past the sensors we have at all the aforementioned ports."

Rapp closed his eyes out of frustration. "What else?"

"A laundry list of materials needed to build the fire set and how to assemble and shape the explosive charge to achieve maximum yield."

The yield was how the explosive power of the bomb was measured. "Have we discovered the yield?"

"According to this right here," Harley tapped a file lying on the table, "twenty kilotons."

"Say again?" asked a somewhat shocked Rapp.

"Twenty kilotons."

"That's no dirty bomb."

"No."

"Any idea where they got this thing? Did they steal it from the Pakistanis?"

"So far we haven't a clue, but all of this is being sent back to the Joint Counterterrorism Center, the Pentagon, and the National Security Council. I would imagine someone very high up in our government will be calling Pakistan any moment and demanding a full accounting of their nuclear arsenal."

"I hope you're right. What else?"

"We have some interesting bills of lading we're trying to decipher, but it's a real jigsaw puzzle."

"What about something arriving by air yesterday?"

Harley asked one of the analysts, and was told no.

"Could it be on one of the computers?" asked Rapp.

The analyst shrugged. He had no idea.

Harley and Rapp walked over to the section that was working on the computers. They were told that so far nothing involving shipping records had been unearthed, but they'd barely scratched the surface.

Rapp wondered if Abdullah had lied to him and thought it might be a good idea to put a few more questions to him. "General, can one of your men bring me to where the interrogations are being conducted?"

Harley called out for one of his aides. He told the junior officer where to take the man from the CIA and then said to Rapp, "If we come up with anything new, I'll send for you."

"All right." Rapp started to leave and then turned. "General, one more favor. Would you have my plane gassed up and ready to go?"

"Consider it done."

WASHINGTON, D.C.

Special Agent Skip McMahon had been with the FBI since the day he'd graduated from Penn State thirty-five years earlier. He'd seen a lot of strange stuff. He'd been involved in more stressful cases than perhaps anyone else at the Bureau, but this one was looking as if it might take the cake. He knew the current situation wasn't a drill because as the man who ran the FBI's Counterterrorism Division, he would have been in on it.

To be rousted in the middle of the night by the shrill ring of his STU-3 secure telephone was never a pleasant experience, but on this particular evening the message he received from the Counterterrorism Watch Center caused him to bolt from his bed and get dressed as fast as his arthritic knees allowed.

Operation Ark had been implemented. The president, his cabinet, the Supreme Court, and the leaders of the House and Senate were all being evacuated from the city. That was part of what they called, "COG," or continuity of government. McMahon was part of "COOP," or continuity of operations. While they fled, it was his job to stay, and try to stop whatever it was that the terrorists were attempting.

At the moment, he was trying to do just that from an elevated glass-enclosed room at the new Tyson's Corner facility. He looked out onto CT Watch, a 24/7 center that monitored terrorist activities around the world. The high-tech room was manned by sixty-two special agents and another twenty-three intelligence analysts from the CIA. The analysts were part of the new Terrorist Threat Integration Center (TTIC). The CIA's Counterterrorism Center was located on a separate floor.

McMahon looked out across the sea of consoles and computers. Something was going on over in Kandahar, Afghanistan. Apparently the CIA, with the aid of the military, had got their hands on some high-level terrorists. Intel was pouring in so fast the translators were struggling to keep up. McMahon saw Jake Turbes, the director of the CIA's Counterterrorism Center, enter the room. He walked hurriedly down the side aisle and joined McMahon in the elevated glass room.

"This just came in." Turbes handed over a piece of paper.

McMahon looked at the list of cities. "These are four of the busiest ports in the world."

"I know, but it's all we have to go on for now."

"In addition to all of the international air-cargo flights?"

"No one ever said it was going to be easy, Skip."

The new Joint Counterterrorism Center wasn't even fully operational and they were getting hit with a scenario that was quickly stretching them to the limits of their capabilities.

"Yeah, I know." McMahon was trying to think of how to deploy his assets. "Any chance you guys are going to be able to narrow this down for us?"

"We're trying."

McMahon dropped the piece of paper on his desk. "I'd better call Reimer and get his people in on this." McMahon was referring to Paul Reimer, who ran the Nuclear Emergency Support Teams for the Department of Energy.

"Good idea." Turbes left the room as quickly as he'd arrived.

McMahon had sixty speed-dial buttons on his secure phone, and Reimer's button was near the top. He pushed it, and a few seconds later the Vietnam vet and retired Navy SEAL was on the line.

Like McMahon, Reimer had also been awakened by the shrill ring of his government issued STU-3 and given instructions to head to the Department of Energy's secure underground facility in Germantown, Maryland.

"Reimer here," he answered in a voice that hadn't quite warmed up.

"Paul, it's Skip. Are your NEST boys ready to go to work?" McMahon was referring to the Department of Energy's Nuclear Emergency Support Team.

"I've already got one of my Search Response Teams doing a random search downtown."

"Great...I've also got some ports for you to take a look at."

"How many?"

"Four to start with. New York, Miami, Baltimore, and Charleston."

The list of cities was met with momentary silence and then Reimer said in a sarcastic voice, "As long as you're at it, why don't you just add New Orleans, Houston, and L.A. to the list?"

"I know it's a big job, Paul."

"Big job! You've got to be kidding me."

"Sorry, but right now it's all we've got to go on."

"What about the airports?"

McMahon grabbed the back of his neck. "We've got agents overseas looking into it."

"What if the damn thing's already in the country?"

"The consensus is that the sensors would have picked it up."

The sensors McMahon was referring to were installed in every U.S. port of entry. They were designed to pick up the radiation signature emitted by a nuclear device. The sensors were good at detecting un-shielded devices, but were less effective against ones that were shielded properly.

Reimer scoffed at the idea that the sensors would have picked up a device entering the country. "I heard some intel on the Pakistani scientists we've been looking for turned up. Sounds like they got recruited."

"Where did you hear that?" asked a genuinely surprised McMahon.

"I just got an intel dump from CTC. They wanted my technical people to go over some information." Reimer stopped for a second and then added, "Skip, you know as well as I do, if they had any scientific help with this thing, they would have shielded it, which means our sensors at the ports have a significantly reduced chance of detecting it. In fact they have almost no chance at all."

McMahon needed to get a better handle on what they were up against. "Let's hope they aren't that savvy."

"Roger that. For now, I'll call in my RAP teams and have them start looking at these ports." Reimer was thinking about the Department of Energy's Radiological Assistance Program. He had twenty-seven teams dispersed at DOE facilities around the country. They weren't as well equipped as his Search Response Teams, but until they got more specific intel they would have to fill the breach.