IT WAS JUST AFTER 7 P.M., the sun setting over the horizon, when the corporal from the Army Corps of Engineers crawled out of the sewer on R Street near the armillary to break the news to Max Seavers, who had the area roped off by his disguised Detachment One Marines.
Seavers, who was hunched over a geological survey of Rock Creek Park in the relative quiet of the playground by the armillary, had noticed the drilling had stopped. "What's wrong, Corporal?"
"We tagged something, but we're not sure what," the corporal said. "So we're tripping right now."
"English, Corporal."
"The casing-er, the tube we dropped down to set off the charges, developed a spur of some kind. So we're bringing the drill bit back up. Once we've tripped the bit back up, we'll send down a mill to bore out the casing. After we retract the mill, the bit will have to be tripped down again."
The only thing Seavers understood was that this was going to cost him even more time. And he had already allowed Yeats too much. "How long is this going to take, Corporal?"
"It's going to cost DARPA about a hundred grand for the new drill bit and about a million for the day as far as the GSA is concerned," the corporal said. "We've got seventy-five men and a lot of equipment down there, sir. This is a massive operation to throw together so fast."
"I didn't ask about the cost, you penny-pinching bureaucrat," Seavers seethed. "I asked how long."
"The trip is going to take about twelve hours each way."
That was 24 hours from now, Seavers realized, just when he was going to be accompanying the Chinese Olympic officials to the Washington Monument.
"That's unacceptable, Corporal. How much further do you have to go?"
"About two hundred feet before we hit what looks to be a cavern, although it's partially collapsed," the corporal said. "But we've hit the harder, more resilient metamorphic rock that's in the way, sir. It's got schists, phyllites, slates, gneisses, and gabbros."
At this point, Seavers knew more about the geology of America's fourth oldest national park than he ever wanted to. Designed for the preservation "of all timber, animals, or curiosities…and their retention, as nearly as possible," the park was 15 kilometers long and almost two kilometers wide, a sanctuary for "many and rare and unique species," according to the act of Congress that created it.
Those species right now included Conrad Yeats and Serena Serghetti.
"Hold on, Corporal," Seavers said, and radioed Landford at the mobile command post. "Where is the NPS in the hunt for our terrorists?"
"Nothing yet, sir," Landford reported. "But they've got all available rangers and police on horseback and foot sweeping the creek area."
Unfortunately, as Seavers now knew, Rock Creek itself ran almost 53 kilometers, and the entire Rock Creek "watershed" covered almost 50,000 acres. Worse, it cut through deformed metamorphic crystalline rocks that were dotted with innumerable sinkholes, caves, and caverns. A quarter of the area was within the boundaries of the federal district, making it a virtual urban Tora Bora in which Yeats could hide for some time.
Seavers looked down at his geological map showing the vast cave systems throughout the area. He was positive Yeats and the nun had followed one of them to wind their way back beneath the armillary. At some point, if he didn't beat them to the globe, they would have to come out, and when they did, he wanted them captured immediately.
But he was taking no chances.
"Corporal, you're done drilling," Seavers said. "We're going to drop a suitcase bunker buster bomb down the casing. It should easily penetrate the remaining two hundred feet of rock to hit the cavern."
The corporal looked shocked. "You drop a mini bunker buster, sir, and you'll probably collapse the cavern, burying whatever it is you're looking for."
"We can always dig it up," Seavers said. "I just don't want it going anywhere."