figure out which sensors were goofed up. The newest ones were part of a high-tech defense system, the IPDS, somewhere in the woods. He had overheard his dad talking to one of the agents about it. Once the system was triggered it sent out a special kind of ray that would cause extreme pain to anyone trying to get through the woods to the inner circle of buildings. His dad thought it was too much, and they were safe enough with the Marines, but Luke liked the idea of something besides fences and soldiers keeping the bad guys out.
âIs it the inner perimeter defense system in the woods? The IPDS? Is something wrong with that?â Luke asked.
From the expression on Isabelleâs face, Luke could tell she was surprised he knew about it.
Adam sighed. âWeâll talk later about where you get your information, which, remember, may not be accurate. Weâre not going to talk about anything specific right now.â
âItâs probably not that, though,â Luke said, trying to see if he would get a reaction. âI bet the earthquake would affect the buildings more. Itâsthe lacing in some of the walls, isnât it? Some of the wires broke and the sensors detected it like someone is trying to break through.â
Isabelle opened her mouth, but Adam spoke first. âWho knows? It could be anything. Did you tell Theo about the old secret door that used to be in one of the cabins?â
Luke knew Adam was trying to get him away from spilling any more security secrets. He wasnât supposed to know about the electric lacing either, but when he had seen some of the soldiers working inside Aspen, the presidential lodge, he figured it out. They had taken off part of the paneling and were checking a spiderweb of wiring underneath it, way more than the wiring needed for electrical outlets.
âA secret door?â Theo asked. âWhat was it used for?â He was looking around as if he expected to find it.
âDonât get too excited. Itâs not here anymore. The President who had it built was in a wheel-chair. I canât remember his name.â Luke looked at Adam.
âFranklin Delano Roosevelt,â Adam said.
âRight. Anyway, he was really scared of fire, so they built a secret door in the wall of his bedroom he could open with a rope. I would have used it just to freak out the Secret Service. You know, sneak out and come around through the front door,â Luke said, knowing this would get a rise out of Adam.
âHilarious,â Adam said, shaking his head. âJust a word of adviceâdonât ever climb out the window and try pulling a stunt like that.â
âI know it wouldnât work. Some motion sensor would trigger as soon as I opened the window.â
âSmart kid,â Adam said. âI have good news. Weâre cleared to stay, and weâre also cleared to go outside, as long as we stay in the inner zone.â
âI think we should work on the robot in the tree house. Okay, Theo? Itâs really big and we can spread out.â
âNice,â Theo said. âCan we take some doughnuts with us?â
âSure, what kind?â
âHow about the ones with chocolate frosting?â
Luke grabbed a huge napkin and piled doughnuts on it. âCome on. Letâs go make the most amazing robot Camp David has ever seen.â
12
The Main Gate
HAGERSTOWN, MARYLAND
The SUV that pulled into the motel parking lot was just like the ones at the Presidentâs ranch, black, shiny, and spotless, as if specks of dust didnât dare land on it. The Secret Service agent driving it wore the typical dark suit and sunglasses, and Callie thought he must be roasting in the heat. She was roasting in her own jacket, but she was afraid to take it off in front of anyone, in case the kitten tried to get out. The man got out of the car and shook her fatherâs hand.
âYou must be Charlie Lansa. Iâm Warren Erickson,â he