Following an investigation into the Apollo 13 mishap, Apollo 14 departed for the Moon 10 months later. For the first time, difficult terrain was selected for the landing. Although the radar failed during the approach, Alan Shepard and Edgar Mitchell were able to make a precision landing with the Antares Lunar Module on 5 February 1971. While exploring Cone Crater, the astronauts made slow progress and lost their orientation. Pulling the vehicle containing the instruments - the 'lunar rickshaw' - proved tiring. As they began to run short of oxygen, they were forced to turn back, only 17 metres from the crater rim. Meanwhile, Stuart Roosa photographed the Moon from the Kitty Hawk Command Module.