When Captain Frank was in a daze with two plastic cards, Lieutenant Niu Wen on the side finally couldn't help but say, "Captain, can you give me my cards?"

"Oh" Captain Frank, who had just come back to his senses, directly handed the yellow plastic card to Lieutenant Niu Wen, and then the two of them solemnly turned around slightly, becoming face-to-face, and together they broke their own plastic card and took out the paper sealed in the thin plastic sheet.

If it is a normal launch, then Captain Frank and they then need to enter the password into the system to confirm, and after getting the final authorization of the system, press the launch button to shoot out the militia in the No. 1 and No. 2 silos.

However, the current situation is different, in order to achieve the purpose of locking the firing system, Captain Frank grabbed the red note folded in half with his fingers, reached out and took out a lighter from his trouser pocket, and after holding it, the two men put the two folded notes in half to the flame.

Until the two notes, one red and one yellow, turned to ashes, Captain Frank and Lieutenant Niu Wen did not open the note to look at it, so that the two who supervised each other also ensured the absolute security of the launch code, and completely eliminated the possibility of leaking the password, because they didn't know what the specific password word was.

Although it didn't take much effort to carry out this set of procedures, Captain Frank and Lieutenant Niu Wen both had a feeling of prostration, and even the soldiers who were watching next to them were relieved one by one.

But before they could sigh any longer, at the end of the corridor leading to the combat center, a series of explosions suddenly sounded, and then in a cloud of smoke, the last barrier between Captain Frank and the undead team disappeared.

"Prepare for battle!" With Lieutenant Niu Wen's shout, the soldiers guarding in front of them first held their breath, pointed their guns at the smoke, and instantly prepared to tear anyone and anything that came out of them to shreds with bullets!

One second, two seconds, three seconds......

But when the American GIs waited for 5-6 seconds, and their mood gradually changed from impatience to surprise and speculation, from the smoke, several smoke bombs suddenly rolled out, and then thick tear gas came out one after another, slowly and irreversibly drifting towards Captain Frank and them.

"Damn! Put on your gas masks and the civilian soldiers retreat to find a replacement. As soon as he saw the rolling tear gas, Lieutenant Niu Wen, who had rushed out of the combat center, immediately roared.

As the garrison of the underground base, these US troops are equipped with M50 gas masks, which is convenient for them to deal with various situations that may occur in a small space, but the civilian soldiers behind the GI, they are not usually in the battle sequence, so they don't even have bulletproof helmets, let alone M50 gas masks, so Lieutenant Niu Wen decisively gave the order for them to retreat.

As a result, within 2-3 seconds, all the civilian soldiers who assisted the defense withdrew, and began to rummage through the cabinets, desks, towels and clothes and other things, and then gagged their mouths and noses after getting wet, so for a while the combat center was filled with chaotic noises and suppressed coughing voices of civilian soldiers.

However, while the crowd on Captain Frank's side was in chaos, a heavy iron door, like a huge tombstone, slowly moved from the tear gas, indicating that the undead team had officially launched a second round of attacks.

As soon as he saw the target, he didn't even use Lieutenant Niu Wen's order, and the garrison soldiers couldn't wait, and one by two directly pulled the trigger, so in the narrow corridor, there was immediately a triple burst of gunfire of "Tututu, Tututu", at this time, because the iron gate was still far away, so the garrison soldiers did not waste precious grenades.

"Dangdang ......" in an instant, after receiving countless bullets fired by M16A4, along the gap between the iron door and the walls on both sides of the corridor, two AR15s also attacked, but unfortunately because of the problem of firing angle and the shooter's line of sight, the AR15 fired at this time, basically there is no accuracy at all, at best, it can only play some purpose of blocking the actions of the garrison soldiers.

A few seconds later, after a brief round of concentrated fire, the garrison immediately realized that what they had done was useless, and as a result, the fierce gunfire immediately became sparse, except for one elite shooter who continued to shoot at the underside and edge of the large iron gate to maintain the pressure on the enemy, and the others watched one after another, patiently waiting for a better chance to kill.

But what is very puzzling is that I don't know if it was because the iron door was too heavy, or if the enemy behind the door had other plans, in short, the eye-catching big iron door, it moved very, very slowly, and it took 3-4 minutes to get to a place about 30 meters away from the entrance of the combat center, and this is exactly the best distance for soldiers to throw grenades.

So without the slightest hesitation, Lieutenant Niu Wen slapped the shoulders of the two soldiers at the same time, and the two soldiers suddenly raised their bodies, and with the cooperation of aiming the two M67 grenades at the iron gate and throwing them, and then the bombardier quickly retracted into the bunker.

With the strong physique of the American soldiers, let alone 30 meters, if it is a standing posture, it is not a problem to throw the small M67 out of 50 meters, and the reason why the enemy is so close to shoot now is that Lieutenant Niu Wen is that after the shock wave of the grenade explosion and the big iron gate is overturned, at a relatively close distance, he can kill more enemies behind the door.

As for Lieutenant Niu Wen's thoughts, it was not difficult for the garrison soldiers present to guess, so as soon as they saw the M67 flying out, they immediately raised their guns, tilted their heads slightly, waited for the explosion to occur, and then in the shortest possible time, they fired bullets at the enemy.

"When, bang!" In a blink of an eye, a grenade fell directly on the iron door, and after a slight rebound, the explosion sounded in no particular order, and the gunpowder smoke once shrouded the iron door, but after a few seconds, to the disbelief of Lieutenant Niu Wen and others, under the shock wave of the double explosion, the iron door did not move at all, what the hell is this?

It turned out that in the battle on the top floor of the 1024 base, the grandfather soldiers of the undead squad also learned a lesson, this time they were behind the iron gate, and simply prepared a few thick iron rods, and every time they moved forward, they immediately used the iron rods to firmly hold the iron gate from the back, thus forming a solid and stable cover, which is also one of the reasons why the iron gate moves so slowly.

Unconsciously, Captain Frank's side was shaken by the undead team again, which almost made Lieutenant Niu Wen and others explode their lungs, but in the face of the big iron gate as strong as a turtle shell, the M16A4 bullets and M67 defensive grenades were really powerless, so the soldiers guarding immediately carried out a venting strafing with hatred, and by the way, they consumed all the remaining bullets in the magazine, and after replacing the new magazine, they were ready for the next Armageddon.

"Tutu...... , when the ...... , flutter ......"

So in the corridor, all kinds of ricochets and rebounds lasted for 7-8 seconds, and after Lieutenant Niu Wen's subordinates finally gave up their useless work, the big iron door like a tombstone moved slowly again......

When the big iron gate approached inch by inch, making the garrison soldiers feel that they were about to suffocate, at this moment, in the No. 1 missile shaft, the three people with wooden handles who had already descended to the bottom were busy around a metal door.

"Nourish...... Poof, poof, poof"

Not long ago, when the undead leader launched a frontal assault, the three of them blew up the sealed door leading to the No. 1 missile shaft in the elevator shaft, and then used electric welding and explosives to destroy the pressurized and heat-insulated steel door, and finally drilled into the missile shaft, and saw the providing, prestigious, and inexplicable sense of oppression of the Minuteman III ICBM at close range.

With a black warhead heat shield and a white slender projectile body, a full length of 18.2 meters and a diameter of 1.84 meters, such a crystallization of human heavy industry and nuclear physics, it stands quietly in the silo with a diameter of about 6 meters, surrounded by all kinds of footing pedals, indicator lights and exhaust slots, patiently waiting for the moment when it is ordered to launch.

Except for the end of World War II, there has been no real nuclear war on the earth, so the nuclear powers are using various ways to show their nuclear muscles, so these behemoths have been standing here quietly, and it is precisely because of their existence that the world has maintained relative peace in the past 6-70 years, once one leaves the launch pad, it is out of control!

Thinking of this in a hurry, he quickly retracted his gaze, and said to his companion in a deep voice: "Let's go down, we can't let them wait too long!"

Then the Demoman of the Undead Squad, he jumped over to the side of the wooden handle, untied a coil of rope from his waist, and tied one end to the metal pipe on the side, and then threw the rope downward, and stretched out his head to watch the "swish" volley of the rope spread out, forming a way down.

Then, as the Demoman and the Civil Specialist slid down the rope, he frowned, first crawled sideways along the wall of the shaft, and after half a circle, he pulled out his pistol and smashed it hard, destroying the camera above the shaft, and then crawled down like a large gecko, with his hands and feet together.

Soon, when he came to the bottom of the missile shaft, the Demoman who had stepped down first, was already studying a ring of deflation valves at the bottom of the shaft.