Independence Day

At the SETI institute in New-Mexico, radio signals are noticed in space but their source curiously comes from the moon. At the Pentagon, a huge spaceship of about 550 km of diameter is observed. The Question whether or not we're alone in the Universe has been answered. Soon, the alien spaceship arrives in orbit aroud the earth and scrambles satellite transmissions. From this vessel extract 10 to 15 smaller ones of approximately 25 km of diameter. Each takes places above the biggest capitals of the planet...