Lunar Flag Assembly flag, placed about from the centerline of the "Eagle" landing craft, was blown over by the blast of the rocket exhaust during takeoff. Because of this, care was taken by subsequent crews to place the flags at greater distances from the Lunar Module. The landing on Apollo 13 was aborted due to a major spacecraft malfunction encountered before reaching the Moon. The flag carried on that flight was destroyed with the Lunar Module "Aquarius" when it reentered the Earth's atmosphere. A review of photographs taken by the Lunar Reconnaissance Orbiter (LRO) indicates that flags placed during the Apollo 12, Apollo
Spacecraft call signs Gemini 4, NASA used the Lyndon B. Johnson Space Center to house the flight control center, and its call sign was Houston, chosen for its location. This practice continues to this day. The practice of using the mission number continued through the first two flights of the Project Apollo manned lunar landing program, Apollo 7 and Apollo 8. But all remaining Apollo missions included two manned spacecraft (Command/Service Module (CSM) and Lunar Module (LM)) on each flight, which required the use of separate call signs for each vehicle when they flew independently of each other. For this reason, NASA permitted