I'm Shirley Griffith.And I'm Steve Ember with EXPLORATIONS in VOA Special English.Today we tell about the flights that followed Apollo Eleven to the moon.The summer of nineteen sixty-nine was a special time in history.That was when men from Earth -- American astronauts -- flew their Apollo Eleven spacecraft to the moon, landed and returned home safely.The world honored the astronauts as heroes.Neil Armstrong and Edwin Aldrin were the first to land on the moon.But they were not the last. NASA -- the National Aeronautics and Space Administration -- launched six more Apollo flights.Apollo Twelve lifted off only four months after the Apollo Eleven flight. Rain had fallen the night before.The clouds cleared, but more rain was expected. Space officials decided the weather was safe enough for them to launch the spacecraft.