“Yes, sir.” The scientist bent over his monitors again, while Richter and the rest of the watching scientists also waited. Five minutes passed, then ten. The other lab-coated men and women fidgeted or grew distracted as the time stretched out. Only Richter did not move a muscle, waiting for the operation to truly commence.

      Finally, Firke rose out of the pipe and signaled his men to take their positions. Two men fanned out, one going left, one going right to flank. Kepler and the fourth man waited until the first pair were both ready to cover, then they quietly replaced the drain grate. Pulling their silenced pistols, the two men moved into the village square, staying low.

      Like most Armenian villages fortunate enough to have one, the water tank was mounted on top of a tall building that looked to be some kind of hotel. This would be the trickiest part of the op, getting to the tower without being detected. Richter had stressed the importance of planting the compound in the tank itself, not in any kind of well. He didn’t know what if any effects it might have on the groundwater table, and they weren’t ready for any sort of test on that scale—at least, not yet.

      With the two flanking men covering the intersection, Firke and his partner headed down a narrow alley that would give them access to the roof where the water tower was located. At the end was an industrial garbage bin, with bags of garbage piled next to it. Taking a folding grappling hook from his harness, he set the rubber-coated tines, then twirled the rope and let it fly up onto the roof. It didn’t connect the first time and came tumbling back down, smacking the team member’s hand when he tried to catch it. The second time was the charm, and soon both men had climbed the rope and were on the roof.

      They reached the water tower without incident. Kepler stood guard at the base while the other man climbed a strut hand-over-hand until he reached the top. This was the crucial point—the man would have to drill a small hole into the pipe to insert the compound. Kepler alternated his glances up with a slow scan around the perimeter walls, watching for any potential trouble.

      It came in the form of a door creaking open down the street. Two people slipped out of a building at the far end of the village. A young man and woman, both giggling, snuck through the silent streets, holding hands as they flitted from shadow to shadow.

      The four-man squad froze. Richter listened to the conversation between them.

      “Leader, I have visual on both approaching targets. Permission to fire?”

      “Negative, keep them covered, but let them approach. We’ll take them out only if necessary. Tank, hold your position.” Firke melted into the shadows on the roof, holding his pistol in front of him with both hands as he disappeared.

      The couple came closer, and Richter saw that they were tourists, maybe two students hooking up on a trip across Europe. They both took shelter in a darkened doorway, the man tilting the woman’s head up for a long kiss, his hand stealing down to cup her breast. She moaned and pressed her body against him, her mouth opening to his. Ordinarily, Firke wouldn’t have cared about them, but they were now blocking the escape route, and their noises might eventually attract the wall guards, which could not happen.

      “Three, take them.”

      Lost in each other, they didn’t notice the urban-camouflaged man emerge from the shadows and slowly creep toward them. When he was a few steps away, he aimed his silenced pistol and fired two carefully placed shots, one into the head of each. The couple, still locked in each other’s arms, collapsed to the ground. The man strode over and put one more bullet into each unmoving form. “They’re down.”

      “You and Four remove the bodies. Put them in the large garbage bin at the back of the alley. Longshot, keep your eyes open for others, and sing out the moment you see anyone. Tank, resume your mission.”

      Richter watched as the woman’s body was picked up and slung over the man’s shoulder as he began walking down the alleyway. Over Firke’s microphone, the faint whine of a small cordless drill could be heard in the background. At the garbage bin, he dumped the limp form inside and waited for his partner to dump the other body. The two men covered both of them with bags of garbage before returning to their original positions.

      Waiting for the cry of alarm that could come at any moment, Richter scarcely remembered to breathe while Tank finished his job, dumping the viscous, black liquid into the water tank, then sealing the hole with a bit of fast-drying putty. He affixed a small, wireless camera to the top of the tank, aiming it down so that the entire street could be seen, then descended just in time to rejoin Firke. The two men tied off their rope and climbed down, then retrieved the rope at the bottom by untying the slipknot and coiling it up. They picked up their flankers and were on the way back to the sewer grate at the spot where they had first come out of the jungle.

      “Mr. Firke.” Richter’s words froze the Englishman in his steps. “I want you and your other men to place at least two more cameras in other areas, so that we can get different views of the experiment. There is no need to acknowledge my orders, just do it.”

      Firke didn’t say a word, but Richter sensed the fury coiled in the man, ready to be unleashed on any available target. Without a sound, he gave the commands to his other two men by hand, sending them off to place the cameras in the best vantage points they could find. Each man completed his task in less than three minutes, giving Richter three lines of sight on the main roads of the small village. It was better than he could have hoped for.

      The two men retraced their steps back to their leader, who led them all to the grate and down into the pipe. They left the area without incident, re-bent the grate into place and snuck away from the village. At a rendezvous point, they waited for the sniper team to rejoin them. The six-man team jogged back to their vehicle and drove down the road a few kilometers until they came to a telephone pole that led to the village. One of the men put on climbing spikes and a tree strap, ascended the pole and cut the wires. Once that was done, the vehicle disappeared into the night.

      “Mission accomplished, Doctor.” Firke had to have switched off the camera on his shoulder, for that monitor went dark right afterward.

      “Don’t forget to launch the drone over the property, Mr. Firke.” Richter straightened, easing his kinked back muscles while around him the men and women drifted away, having either lost interest in what was happening or moving on to other tasks.

      The doctor pulled up a chair and checked his watch: 1140. In several hours the townspeople would be up and about. He pulled his notebook closer to him and rechecked that the camera on the water tower was transmitting properly.

      Now it was simply a matter of waiting for the experiment to begin.