What's the name of the movie where spaceships fall from the sky and aliens kill people?

abstract

Before Americans were ready to celebrate the Fourth of July, monitoring stations all over the United States found a huge spaceship approaching the earth hundreds of miles away. The radio signal sent by the spacecraft interfered with the communication satellite signal of the earth. The alien fleet surrounded the earth on a large scale, and the spacecraft released 36 sub-spaceships with a diameter of 15 miles to fly over the major cities of the earth. People in the world are confused and afraid, but some people want to welcome the arrival of the alien friendly messenger.

David, a computer engineer, found that the signal sent by aliens is actually a countdown signal to the attack. David tried to tell his wife Connie that she was the president's assistant and her relationship with David broke up because of work. The president was worried that the government tried to contact the aliens, but there was no response. After learning the news of David, he hurriedly ordered the evacuation, but it was too late. Alien spacecraft began to launch deadly attacks on several big cities in the United States.

So the wise and brave American President Thomas Pullman called on all countries in the world to resist foreign aggression and turn July 4th into the Independence Day of the Earth. With the help of computer David and black air force pilot Steven and others, the earth people launched a full-scale counterattack against aliens, and the president personally drove the fighter plane to the front. The US Air Force launched an attack on the alien spacecraft, but it was like throwing an egg at a stone, which didn't help. Only pilot Steven managed to induce an alien combat airship to crash.