article_snippet.sent: Sherpa was an explosives expert serving in Afghanistan in 2011, when Sherpa went to investigate an explosion that wounded Sherpa colleague.
article_snippet.sent: Sherpa was hit by another explosive device and seriously wounded, and two years later, had Sherpa right leg amputated below the knee.
article_snippet.sent: Sherpa retired from service and has been climbing since with The Heroes Project, a nonprofit organization that helps wounded veterans.
highlights_snippet.sent: Two years later, he had he right leg amputated below the knee .
  
highlights_snippet.sent: he retired from service and has been climbing since with The Heroes Project, a nonprofit organization that helps wounded veterans .
  