Chapter 1505: Rat in the pipe

In the medical center building, Colonel Max paced back and forth. While reaching out for the communication headset, he said in a deep voice, "The search groups report the situation."
"One group completed the check of the predetermined target, but no target was found."
"The second group completed the task and found no target..."
"Three groups...no target found..."
Colonel Max frowned, and he asked in a deep voice, "How about the ambush point in the passage?"
"Reporting sir, we are still waiting for the target to appear. But so far, everything is normal." The US military team replied in a deep voice.
Colonel Max pondered for a moment. He knew that these mercenaries could not disappear for no reason. Now the entire medical center building has been searched, but they are still missing. Then there are only two possibilities: one is to sneak into the command center along the connecting passage between the two buildings. The other is to withdraw from the medical center, but instead of taking the passage, to withdraw to the periphery.
Max's initial judgment was that this group of sneakers would definitely follow their predetermined plan to walk the connecting passage between the two buildings. Therefore, he secretly placed heavy soldiers in ambush. As long as these intruders passed through this passage, they would be enclosed in it, making it difficult to fly. What I didn't expect was that this group of people unexpectedly evacuated outside, where can they evacuate? How many other command centers? This also seems unlikely.
Max was silent for a while and suddenly woke up and ordered, "They didn't give up, they will definitely find other ways to sneak in. We withdrew from the medical center and searched on both sides. Priority is given to searching for more noticeable areas and rarely used auxiliary facilities. . Act now."
"Colonel, are there any more people here in the passage?" the American sergeant asked.
"The personnel in the passage must not be withdrawn. This is a key area and continue to guard. Other people, follow me." Colonel Max said in a deep voice. "Leave immediately. They probably have already acted. Tell the surveillance department to pay close attention to the status of all surveillance camera facilities and don't let any abnormalities go. Our opponents are very good at sneaking."
"Yes, sir." The American sergeant agreed.
Colonel Max opened the map as he walked, "Here, what else is this place?" He pointed to two nearby places on the map.
"One is a sewage treatment center, and the other is a ventilation room." The US military replied.
"Sewage treatment center and ventilation room?" Max pondered for a moment, "Go, let's go there first."
"Colonel, shall we go to the sewage treatment center or the ventilation room?" the US soldier frowned.
"The sewage treatment center has no meaning. Unless those people can turn into rats and run from the sewers to the command center. But the ventilation room is different. The ventilation ducts extend in all directions and theoretically can lead to any place in the base. So they must go. The ventilation room. Everyone comes with me." Max said solemnly.
Colonel Max took his people to the ventilation room quickly. He first raised his hand to stop everyone from moving. After listening carefully, he raised his hand and gestured to count down. "Three, two, one! Turn off the lights!" As the lights dimmed, two U.S. troops suddenly broke the door, and other soldiers raised their guns from behind and rushed in. In the dark, the enhanced night vision on their helmets worked extremely well.
"Safe on the right!" a U.S. soldier whispered while holding a gun. "Left wing is safe." "The back of the machine room is safe." Several US soldiers breathed a sigh of relief, "Confirm safety, turn on the lights!"
The lights in the computer room were turned on, and there were eight ventilation devices working in this large computer room. There is nothing suspicious other than that. Colonel Max came over and checked, and said sharply, "Search this area and don't miss any clues. They are probably hiding nearby and check all the ventilation ducts."
"Colonel, there is a discovery here." After a U.S. military inspected it, he said in a deep voice, "Here is a ventilation duct. The barbed wire has been removed, and there are footprints inside."
Colonel Max walked over, touched the footprints with his hands, and frowned, "The traces are very new."
"Colonel, did they get into the pipeline?" the US soldier asked. "Should we chase in?"
"Chasing? How to chase? These ventilation ducts extend in all directions and are very narrow. Even if you chase in, you can't catch them." Colonel Max said.
"Colonel, several drawings were found here. It looks like drawings of nearby ventilation ducts. Maybe this group of people left them." A soldier walked over with several drawings. Colonel Max frowned, "Since these drawings have been thrown down, it means that they don't pay much attention to them. Check it out. What are the missing parts of these drawings?"
"A part is missing, it seems to be part of the command center." A soldier replied. Another soldier also turned around at the mouth of the pipe and said, "There seems to be a faint sound inside."
"There are often rats in these pipes. It is not surprising that there is a little movement." The sergeant shook his head.
"But it doesn't sound like a mouse or something, it's like a metal collision." The soldier doubted.
"No doubt, they must want to enter the command center through the ventilation ducts and perform decapitation tactics on Herbert. Retreat all of us and guard every ventilation duct opening in the command center. Also, strengthen defense here. Keep every exit so that they can't get out at all. Let's catch turtles in an urn and see how long they can stay in this pipe." Colonel Max smiled coldly.
"Yes, Colonel." The American lieutenant nodded. "This time, they will suffer."
Max whispered, "This is not enough. Judging from their actions, this group of mercenaries are very experienced. You personally bring two platoons of soldiers, the commander to his room, and add more guards outside. ."
"Colonel, what do you mean?" the lieutenant brows.
"Even if we really blocked these people in the ventilation ducts. But it can be prevented. What if this group of people rush out desperately and fight us to death?" Max smiled and slowly said. "Their goal is to assassinate the commander, so they will definitely go at him. Now we transfer the commander back to his room. Then, even if these intruders rush out, they will get nothing.
I am not saying that they will be able to rush out, but if they can not take risks, why should we take risks? Call Commander Herbert back to the room, and when we catch these intruders, he can come and see for himself. "
"The colonel should be thoughtful." The lieutenant nodded.
"Go and do it now. Remember, you must guard every exit of this ventilation duct heavily. If you are short of manpower, you can transfer all the people from other positions and focus on the defense of the command center. I want to kill these people in one fell swoop." Colonel Si shouted in a deep voice.