Russian marines take on more than 30 obstacles in a course that exceeds 10 kilometers.
Stunning Volcano Eruption from Space
Crew aboard the International Space Station captured this image of the Sarychev Volcano as it erupted on June 12, 2009. Sarychev Peak is located in the northern part of the Kuril Islands, a Russian archipelago in the northwest Pacific. Credit: NASA/JSC/Image Science and Analysis Laboratory