Apollo 17 investigate the possibility of relatively new volcanic activity in the same area. Cernan, Evans, and Schmitt returned to Earth on December 19 after a 12-day mission. Apollo 17 is the most recent manned Moon landing and the most recent time humans travelled beyond low Earth orbit. It was also the first mission to have no one on board who had been a test pilot; X-15 test pilot Joe Engle lost the lunar module pilot assignment to Schmitt, a geologist. The mission broke several records: the longest moon landing, longest total extravehicular activities (moonwalks), largest lunar sample, and longest time in
Fallen Astronaut upright. He also denies it was agreed he would remain anonymous. Both his and Scott's versions of events are given in an article in "Slate" magazine in 2013. During the Apollo 15 mission, near the completion of his work on the lunar surface on August 1, 1971, Scott secretly placed the "Fallen Astronaut" on the Moon, along with a plaque bearing the names of eight American astronauts and six Soviet cosmonauts who had died in service: Scott photographed the memorial, but waited for a post-mission press conference to publicly disclose its existence. Later, he noted that "Sadly, two names are