Miles before Desi Linden made history by winning the Boston Marathon, she didn't think she'd even finish the 26.2-mile race.
So she was more than willing to help Shalane Flanagan, her friend and competitor, try to win.
When Flanagan, the 2017 New York Marathon champion, darted into a Porta Potty just a couple miles into the race, Linden decided she'd slow up, wait for Flanagan and help her catch the lead pack.
"Honestly at mile 2, 3, 4 I didn’t feel like I was gonna even make it to the finish line," Linden said in an interview after her victory.