Heinkel built first jet aircraft
The Soviet Union successfully launched Sputnik I. The world's first artificial satellite about the size of a beach ball
Soviet cosmonaut Yuri Alekseyevich Gagarin went into space on a ship called the spacecraft Vostok 1.
Apollo 11 was the first spacecraft to land on the Moon with people on it. The first people on the moon were Neil Armstrong and Buzz Aldrin
The September 11 attacks were four terrorist attacks at the same time