When he reached the west elevator tower, he drove past it, then backed the trailer right up to the door, leaving only enough room to open the trailer doors. He waited while the guard walked down to open the gate. So far, so good.
He was out of the truck and waiting when the guard arrived. The man rummaged through a huge key ring for the proper key, then opened the large metal door. The skinny man stepped forward and used a shim to block it open. Both men walked into a small room, where the elevator doors sat. Instead of a button to call the elevator, it required a key.
The guard looked back at him, at the same time twisting another key off the ring. "I'll leave this one with you. You'll probably need it. If you go down to the bottom, be sure to take it or you won't be able to get back up." He made a dismissive gesture with his hand. "I'm sure you know all about that."
When the security man opened the elevator, he looked down at the floor and ran his foot over the seam. "It looks fine to me."
"It might be intermittent. I'll run her up and down a couple of times and see. If not, I'll adjust the switches anyway. That should fix it." His research on elevator maintenance suggested that adjusting the switches was the answer to almost everything.
The guard nodded, then handed him the key. "All right, I gotta get back to my post. I'll come back to check on you occasionally." He started off, then stopped and turned. "By the way, what'd you say your name was?"
The skinny man froze. He forgot the name he was supposed to use. The name "George" floated through his head, and he almost popped it out, which would have been a disaster since it would not have matched what was on the work order. The name was not George, but it sounded similar — Jerry, John… He suddenly remembered and blurted it out. "Jim. Nice to meet you."
The security man didn't seem to notice anything strange. "Good luck, Jim. Let me know if it starts looking like you won't be done by eight."
He nodded, and watched the guard walk away. He clenched his hand around the elevator key. He was in. Now the hard part.
By 5:00 a.m., he had the control panel open in the elevator, exposing the wires. He placed cones around the back of the trailer to discourage anyone from walking in. He hoped the guard wouldn't come back until he finished what he needed to do.
Out of the tool belt on his waist, he pulled a disassembled cell phone that had been wired into a small circuit board. He had already tested the phone back in Vegas, and he knew his modifications would work. He placed the phone up high, almost to the ceiling of the elevator, then duct taped it to the wall. He checked the signal strength and saw three bars, which was good enough, something he had worried about. Sorting through the wires from the control panel of the elevator, he found the two he was looking for. He bared some of the insulation from the two wires and then clipped a wire to each from the circuit board. He then quickly replaced the control panel. After close inspection, he saw that everything looked normal except for the two wires connected to the cell phone and circuit board. If anyone looked up, they would think it was a bomb. However, he had no intentions of letting anyone see it.
Now things would get exciting. He walked outside and peeked around the back of the trailer at the guard shack. He could see the guard was still in the shack. He knew he didn't have much time. He hustled back into the trailer, and removed the false wall, where the night before he had retrieved the single hair. Before, with the false wall in place, someone could have noticed that the inside wasn't even half the size of the outside. However, he had not intended to let anyone get a good look.
Now with the panels gone, a dozen white metal fifty-gallon barrels were exposed, stacked three wide, two high, and two deep. He used a special dolly with a lift jack to grab the first barrel off the top row. When he first tried to move the barrels back in Vegas he was surprised at how heavy they were, hence the expensive dolly. He wheeled the barrel down a metal ramp out of the trailer and right into the elevator. Laying it down on its side on the floor he shoved the barrel's bottom against the back of the elevator. A few minutes later a whole row of barrels were lying on their sides against the back of the elevator. He was on his way back to get the next barrel when he heard the security guard's voice.
"Everything all right in there?"
The sound made him freeze. He wiped sweat off his forehead, then poked his head out from behind the trailer. The security man had walked down the access road onto the dam, but headed west toward the visitor center door instead of toward the elevator.
He yelled out to him, "Yeah, I'm just checking everything right now."
The man waved and kept walking toward the visitor center.
He increased his pace on the remaining barrels. Fifteen minutes later he had all twelve barrels stacked, four wide and three high, against the back of the elevator. The elevator sagged slightly at the weight and no longer lined up perfectly with the floor. With the last barrel in place he removed the clamp off one of the top barrels and removed the metal lid. The inside was packed tight with what looked like dirty white crystals or pellets. The smell of diesel invaded his nostrils when the lid came off. He removed the remaining lids and tossed them in the small room outside the elevator shaft, the smell of fuel now strong in the elevator.
He hustled back into the trailer twice and retrieved the footlocker on one trip, and a car battery on the next. He set the car battery under the elevator control panel, and then opened the footlocker. He pulled a metal tube almost eighteen inches long and an inch in diameter out of the box. The tube had two wires hanging out of it. He forcefully rammed it in one of the barrels until only the wires were visible. The motion dislodged white pellets which trickled to the floor. He took no notice, continuing working until all twelve barrels had wires hanging out of them. He then spent the next few minutes wiring them together. He finished by connecting them to the circuit board and finally to the car battery. When he connected the car battery, a red LED illuminated on the circuit board.
He took a moment to check his work. The materials he used were all readily available. The white pellets were the hardest to get, and required that he make a purchase in Utah, using his grandfather's name for their farm in southern Utah. Even the farm stores wouldn't sell that much fertilizer to a city boy. The ammonium nitrate fertilizer was common enough, if you had a good reason to buy it. Of course his grandfather was too old to notice that it never made it onto the fields.
Although he had heard about ammonium nitrate being used for bombs, most notably the Oklahoma Federal Building, it had been a surprise to learn that ammonium nitrate was not the core of the bomb. The explosive part of the bomb was the diesel fuel itself. The ammonium nitrate only acted as an accelerant, providing an oxygen boost during the chemical reaction of the explosion. However, gasoline bombs, with and without the fertilizer, were not in the same league, as evidenced in Oklahoma, where the bomb sliced through ten stories of the Federal Building as if it were cut with a knife.
One of his biggest concerns for this bomb was channeling the explosive. Since the elevator shaft traveled down the downstream side of the dam, he needed the bulk of the explosion to be channeled upstream. That's why he pushed the barrels back against the back wall of the elevator, and left the fronts open. Explosions take the path of least resistance, and he hoped that the bomb would get plenty of upstream momentum before it hit the huge wall of concrete. It wouldn't do any good to blow the elevator shaft apart. He needed it focused upstream, to channel the explosion.