The Pentagon is located in the town of Arlington on the Potomac River near Washington, USA. It is the seat of the U.S. Department of Defense. Viewed from the air, the building is shaped like 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, which can accommodate 30,000 people. There is a large parking lot 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.
The Joint Chiefs of Staff, known as the "soul of the Ministry of Defense," is on the second floor. This floor of the office building is paved with golden carpets and is known as the "Golden Hall."
The Office of the Secretary of Defense and the Department of the Army are on the third floor.
The fourth floor is the Admiralty.
The fifth floor is the Air Force Department.
In a corner of the fifth floor, there is the 'Space Surface Surveillance and Security Information Department', which is specially split from the space agency. Its main function is to gather a variety of surveillance, spy, and commercial satellites, intercept communications, and update intelligence from various countries in a timely manner. Provide round-the-clock and endless protection to every country on the planet.
Sudden.
The Space and Surface Monitoring Safety Information Department sounded a red warning.
A door away from the command room hall, Harold was in the office approving the next satellite to focus on monitoring the country. He had strong muscles bulging under a close-fitting suit, thick arms, straight waist, and a shaved head on his face. Even two years after he transferred from the Air Force fighter unit to civilian service, he still retains that strong military style.
With love for the country and a sense of mission, responsibility and justice, he took 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.
The Ministry of Space and Surface Supervision and Security Information’s supervision of surface countries is roughly divided into five levels.
They are classified according to Mach level.
The lowest level is Mach 10 aircraft flying in the airspace of various countries. Only a few countries on the surface have Mach 10 fighter jets.
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 are only owned by the country that Harold is proud of and loves. Every covert take-off test makes Harold feel proud.
The fourth-level alarm has never sounded. Many information engineers in the Space and Earth Information Department 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 head of the Space and Surface Monitoring and Security Information Department once jokingly said: At this level, it will only sound if aliens appear.
At this time, Harold's mind flashed through what the old guy said before leaving.
The flashing thought disappeared in the next moment. With a stern face, Harold 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?"
"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 happen!"
Harold's stern voice, with a strong will, suppressed the panic of this group of information engineers, and inexplicably made the information engineers who were preparing for a riot feel a little calmer.
"Minister, fifteen seconds ago, a black shadow appeared in the stratosphere over Switzerland, 50 kilometers above the ground. Instantly, it began to patrol over Switzerland at a speed of over Mach 300. While we were talking, the black shadow had already entered France. It's patrolling in the sky," an engineer quickly reported.
Harold's stern Chinese face 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 took 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 shadow, the high-resolution dynamic edge detector, and the emission spectrometer to calculate that the shadow has a speed of Mach 1,000!" A female information engineer screamed, inserting her hands into the In Jin's hair, his eyes were glazed with disbelief, and he suspected that he was in a dream.
"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 1,000, 340 kilometers per second.
small book booth
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 across 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. I hope there is an error!" Ling Yi There was sweat on his forehead, his breathing was slightly rapid, his heart was heaving, and he answered quickly.
"Publish his route map!" Harold suppressed his frightened speculation and stared at the screen.
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, the United Kingdom, Spain... there is no missing track, and the trace of this sonic boom cloud can even be found in the stratosphere.
Where there are people, there are black shadows passing through the stratosphere in the sky.
The shadow is scouting, measuring human territory.
Harold's heart twitched fiercely.
"It has completed patrols over Switzerland, France, the 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 engulfed in 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, looking very embarrassed.
They can only watch helplessly as the black shadow patrols, inspects, monitors, and records the territories of various countries.
Until he started traveling across Canada, a programmer cried with trembling lips:
"He crossed Canada and came to...our country..."
The United States covers an area of 9.3 million square kilometers and spans 4,500 kilometers from east to west. Flying over the United States at a speed of Mach 1,000, it only takes 13 seconds to cross the American 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 the Sword of Damocles 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 the inspections have been completed, each country may not have realized that there was a dark shadow crossing the sky of its own 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 quickly in the corridor, but 13 seconds was like a magic spell, urging him to move forward. He started running directly, knocking over a pretty civil lady and not even bothering to apologize. He spent all his life's strength, He ran down the stairs to the office of the Minister of Defense on the third floor. He rushed in without knocking on the door.
Fortunately, the Minister of Defense was not doing anything confidential, but he still frowned at Harold for being so rude, and Harold's anxious expression made the Minister of Defense suppress his dissatisfaction.
"Harold, is there something so important that you don't even bother knocking on the door?" Defense Minister Singer stared at him and asked.
Harold took a breath, looked directly at the Minister 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 through Switzerland, France, the United Kingdom, and Spain. , Poland, Italy...through Canada, and while I'm talking to you, he's 50 kilometers above the country, passing through the stratosphere."
"???"
Defense Minister Singh's head flashed with doubts: "Are you kidding me? Mach 1,000?"
"No. We need to inform the president to prepare armaments and prepare for a civilized war."
Harold's serious, serious and stern expression made Defense Minister Singer aware of 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.
Singer put down the satellite phone with a gentle smile on his face: "This is all his will. The laser engraving nanotechnology given by him has begun to be constructed around the world. After completing the order, what is left is me. Waiting for the 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, the Space and Surface Monitoring Security Information Department will be disbanded. You are about to go to the Hoover Dam to assist Dr. Hale in handling any matters."
