Babak Tafreshi via National Geographic)
Steve Helber, AP via National Geographic)
Kristen Luce via National Geographic)
Ronan Donavan via National Geographic)
Jimmy Chin via National Geographic)
Don Ryan, AP via National Geographic)
Marcus Yam, Los Angeles Times/Getty via National Geographic)
Joel Kowsky, NASA/Getty via National Geographic)
Jeff Roberson, AP via National Geographic)
Alex Millan Tracy, SIPA/AP via National Geographic)