Pentagon is located in Arlington next to the Potomac River near United States Washington, where U.S. Department of Defense is located. Viewed from the air, the building forms a regular pentagon, hence the name "Pentagon".
The building covers an area of 29 acres. The building is 22 meters high and has 5 floors. The total construction area is 608,000 square meters and the usable area is about 344,000 square meters. It can provide offices for 30,000 people. There are large parking lots on the north and south sides of the building, which can park 10,000 cars at the same time.
There are banks, post offices, bookstores, clinics, telegraph offices and various shops in the lobby on the first floor of the building.
Joint Chiefs of Staff, known as the "soul of Department of Defense", is on the second floor. The office building on this floor is covered with golden carpets and is known as "Golden Hall".
The long office of Department of Defense and Department of the Army are on the third floor.
The fourth floor is Department of the Navy.
The fifth floor is Department of the Air Force.
In a corner of the fifth floor, there is also the 'Space-to-Surface Surveillance Safety Information Department', which was specially split from the space agency. Its main function is to gather a variety of surveillance, spy, and commercial satellites, intercept communications, update the intelligence of various countries in a timely manner, and carry out all-weather and endless protection of various countries on the earth.
suddenly.
Space-to-Surface Surveillance Safety Information Department A red warning sounded.
A door away from the hall of the command room, Harold, who was in the office approving the next satellite to focus on monitoring the country, had strong muscles bulging under a close-fitting suit, thick arms, straight waist, and a shaved head. Even though he had been transferred from the Air Force Fighter Jet to civilian service for two years, he still retained that strong military style.
With his love for the country and his sense of mission, responsibility and justice, he assumed the important position of deputy minister at the age of 37.
With a sudden movement, he stood up from his comfortable seat, his Chinese-character face was stern, and his eyes flashed with surprise.
"Minister, red warning!" A secretary hurried over and reported nervously.
Space-to-Surface Surveillance Safety Information Department's supervision of the countries on the surface is roughly divided into five levels.
They are classified according to Mach classification.
The lowest level is Mach 10 aircraft flying in the airspace of various countries. Only a few countries on the surface have a Mach 10 Fighter Jet flight speed.
The second level is Mach 20 flying objects. At this level, there are only a few military powers that focus on it.
As for the third-level Mach 30 flying objects, they can only be owned by the country that Harold is proud of and loves. Every covert take-off test makes Harold who is monitored feel proud.
The fourth-level alarm has never sounded. Many information engineers in the Department of Space and Earth Information believe that this is just an alarm that will sound honor for their country in the future.
As for the highest fifth-level alarm, the previous person in charge of the Space-to-Surface Surveillance Safety Information Department once jokingly said: At this level, it will only sound if aliens appear.
At this time, Harold's mind flashed through the words of the old guy who was lying on a corpse and had nothing to eat before he left.
The flashing thought disappeared in the next moment. Harold, with a stern Chinese face, stepped out of the office resolutely and came to the Information Department lobby where multiple screens were lined up on the wall.
"How is that possible?"
"What on earth is this?"
"Oh my God!!"
"Is he... a human being?"
"Are aliens coming?"
"This is impossible."
"There are no flying objects above Mach 50 on Earth!"
Surprised and frightened voices kept rising in the lobby of the Ministry of Information.
"What happened!"
Harold's fierce shouting voice, with a strong will, suppressed the panic of this group of information engineers loudly, and inexplicably made the information engineering staff who were preparing for a riot feel a little calmer.
"Minister, fifteen seconds ago, a black shadow appeared in the stratosphere above Switzerland, 50 kilometers above the ground. Instantly, it began to patrol above Switzerland at a speed exceeding Mach 300. While we were talking, the black shadow had already entered the sky above France and was patrolling." An engineer quickly reported.
Harold's stern face with the Chinese characters tightened, and he looked at the screen on the wall. On the fixed screen that reflected the surface of France from above, a black shadow appeared across the screen, constantly patrolling over France.
With its rapid speed, it only takes a few seconds to complete the patrol over France.
How could this speed be only Mach 300!
"Oh my God! The monitoring satellite used the distance and time of the black shadow, the high-resolution dynamic edge detector, and the emission spectrometer to calculate that the black shadow has a speed of Mach 1,000!" A female information engineer screamed, inserting her hands into her pale blond hair, staring with eyes that were dull in disbelief, and suspected that she was in a dream.
"Are you sure?"
Harold's heart of steel, which had been tempered in the most severe battlefields, could not help but tremble violently as he shouted.
The earth has an equatorial radius of 6378.137 kilometers, a polar radius of 6356.752 kilometers, an average radius of about 6371 kilometers, and an equatorial circumference of about 40076 kilometers. It is an irregular elliptical sphere that is slightly flattened at the poles and slightly bulging at the equator.
A circle around the earth is about 40,000 kilometers.
It only takes about 117.6 seconds to circle the earth at a speed of Mach 1000, 340 kilometers per second.
In less than two minutes, the black shadow patrolling the sky is enough to circle the earth.
If the black shadow were a living thing, he would run rampant on the earth.
If the black shadow is an alien creation, then the earth will face the most severe test of civilization.
"OK! We have successively used high-resolution imaging spectral radiation, multi-angle imaging spectral radiometer, spaceborne thermal emission and reflection radiators, and atmospheric infrared detectors. We have calculated it several times and are still calculating it. I hope there is an error!" An engineer who made sweat appear on his forehead and his breathing was slightly short, his heart heaving, answered quickly.
"Publish his route map!" Harold suppressed his frightened speculation and stared at the screen tightly.
When the black shadow's route map appears on the screen, you can clearly see that every time the black shadow turns back, it does not exceed human habitation.
He could have plunged straight out of the ocean, but no, he only turned back on land.
From Switzerland to France, United Kingdom, Spain... there is no missing trajectory, and the trace of this sonic boom cloud trajectory can even be found in the stratosphere.
Wherever there are people, there are black shadows passing through the stratosphere in the sky.
The shadow is scouting and measuring the human territory.
Harold's heart twitched fiercely.
"It has completed the sky patrols of Switzerland, France, United Kingdom, Spain, Poland, and Italy. He is conscious. He is patrolling and scouting the areas of various countries and human areas!"
"Is it retribution? Retribution? He's doing what we do!"
The entire information department hall was shaken by a huge earthquake, trembling with fear and horror.
An engineer stepped back so tremblingly that he bumped into a shocked colleague with dull eyes. The two of them rolled together in a very embarrassed state.
They can only watch helplessly as the black shadow patrols, patrols, monitors, and records the territories of various countries.
Until he started to travel through Canada, a programmer cried with trembling lips:
"He passed through Canada and came to... our country..."
United States has a land area of 9.3 million square kilometers and an east-to-west span of 4,500 kilometers. It flies over United States at a speed of Mach 1,000. It only takes 13 seconds to cross the United States sky from east to west.
13 seconds.
Harold turned around and left the lobby of the Ministry of Information. For 13 seconds, it was like Sword of Damocles was hanging above his head. He didn't know how the earth could stop such a flexible black shadow with a speed of Mach 1,000 from patrolling various countries.
Maybe even after each country has been inspected, they haven't realized that there was a black shadow crossing the sky of their country.
The country that makes him proud, proud, and honorable does not have the weapons to contain a shadow that exceeds Mach 1,000.
The tie of the suit made it difficult for Harold to breathe. He gasped for air and pulled off the tie. His usually unwavering pupils and will were trembling.
At first, he just strode Zoom down the corridor. The 13 seconds were like a magic spell, urging him to move forward. He started running directly, and he didn't bother to apologize for knocking over the pretty civil lady. He used up all his strength to run down the stairs and arrived at the Department of Defense minister's office on the third floor. He hurriedly walked in without knocking on the door.
Fortunately, Chief Department of Defense did not do anything confidential, but he still frowned at Harold for being so arrogant, and Harold's anxious and perspiring expression made Chief Department of Defense suppress his dissatisfaction.
"Harold, is there something so important that you don't even bother knocking on the door?" Department of Defense looked at him and asked Singh.
Harold took a breath, looked directly at Department of Defense, and said sternly, "Yes. A black shadow appeared in Switzerland, and was regularly patrolling the fields of various countries at a speed of Mach 1,000. He passed by Switzerland, France, United Kingdom, Spain, Poland, Italy... Passing through Canada, while I am talking to you, he is 50 kilometers above the country and passing through the stratosphere."
"???"
Department of Defense Singh's head flashed with question marks in confusion, "Are you kidding me? Mach 1000?"
"No. We need to notify the president to prepare armaments and prepare for a civilized war."
Harold's serious, serious and stern look made Department of Defense Zhang Singh realize the seriousness of the situation.
He stared deeply at Harold and quickly picked up the encrypted satellite phone before he could speak.
At this time, 13 seconds have just passed.
Singh put down the satellite phone and showed a gentle smile on his face, "This is all his will. The Laser Precision-Engraved Nanomaterial Technology given has begun construction around the world. After completing the order, what is left is our vitality. What we should do is not to prepare armaments and face war. But to dig out the underground cities that allow the people of the country to survive."
"The dark sky covers the sun, and the earth is about to enter its coldest period."
"Harold, starting from today, Space-to-Surface Surveillance Safety Information Department will be disbanded. You will go to Hoover Dam to assist Dr. He-El in handling any matters."