After helping to set up the Early Apollo Scientific Experiment Package, Armstrong went for a walk to what is now known as East Crater, east of the LM, the greatest distance traveled from the LM on the mission. His final task was to remind Aldrin to leave a small package of memorial items to Soviet cosmonauts Yuri Gagarin and Vladimir Komarov, and Apollo1 astronauts Grissom, White and Chaffee. The Apollo 11 EVA lasted two and a half hours. Each of the subsequent five landings was allotted a progressively longer EVA period; the crew of Apollo 17 spent over 22hours exploring the lunar surface. In a 2010 interview, Armstrong explained that NASA limited their Moon walk because they were unsure how the space suits would cope with the Moon's extremely high temperature.