80-year-old doctor runs his 45th Marine Corps Marathon, brings awareness to health care nonprofit

An 80-year-old doctor is set to run his 45th Marine Corps Marathon, only missing the race twice since first competing in 1977. Dr. Glenn Geelhoed has run more than 170 marathons on all seven continents, but his true passion is saving lives through his nonprofit, Mission to Heal.

Mission to Heal brings medical supplies and training to the most remote corners of the world.

"We have done what we can to help not just to heal the folk that we see immediately by cutting and sewing, but by teaching those skills such that it continues beyond us," Geelhoed told CBS News.