Karin Hendrickson, bib #20, at the start of the 45th Iditarod Trail Sled Dog Race in Fairbanks, Alaska, Monday, March 6,2017. Hendrickson is a seven-time veteran of the Iditarod, taking only one year off in 2015 after she broke her back in three places. (RSS/AP Photo/Ellamarie Quimby)