Last month, Air Force Times spoke with participants of the Air Force Seven Summits Challenge, a group of airmen who set out to climb the tallest mountain on each of the seven continents to raise money for charity and commemorate the fallen. The men left March 28 for the Himalayas, and they have been posting to an Air Force-related blog, updating the public on their progress. In yesterday’s post, Seven Summits team member Rob Marshall expressed the sad news of the death of 37-year-old DaRita Sherpa, a member of the International Mountain Guides whom the group encountered at the camp.…