Wikipedia Info: Apollo 13 was the third manned lunar-landing mission, part of Project Apollo under the NASA in the United States. It launched on April 11, 1970. Two days after the launch, the Apollo spacecraft was crippled by an explosion, causing the Service Module portion of the Apollo Command/Service Module to lose its oxygen and electrical power. The crew used the Lunar Module as a “lifeboat” in space. The command module systems remained functional, but were deactivated to preserve its capability to reenter Earth’s atmosphere upon return to the earth. The crew endured difficult conditions due to severe constraints on power, cabin heat, and potable water, but successfully returned to Earth.