Slideshow: Quest musher Sass vows comeback, will wear helmet

Eureka, Alaska, musher Brent Sass heads up the Yukon River as he leaves Dawson City, Yukon, on Thursday morning, Feb. 6, 2014, for the second half of the Yukon Quest. Sass is nearly an hour and a half ahead of second place musher Allen Moore of Two Rivers, Alaska. Marcel Vander Wier/Whitehorse Star
Marcel Vander Wier/Whitehorse St
Brent Sass of Eureka on the Yukon Quest International Sled Dog Race trail.
Mark Gillett
Musher Brent Sass is placed onto a plane on a stretcher Sunday afternoon in Braeburn. The 34-year-old suffered a head injury in a fall on the Yukon Quest trail from Carmacks to Braeburn. Sass is reportedly in stable condition and was airlifted to Whitehorse.
Photo by Marcel Vander Wier
Brent Sass of Eureka had been dueling for the 2014 Yukon Quest lead until suffering a head injury between the Carmacks and Braeburn checkpoints that ended his race.
Mark Gillett / Yukon Quest
Brent Sass of Eureka, Alaska, waves to the crowd as he gets ready to leave the starting line of the Yukon Quest International Sled Dog Race on Saturday, Feb. 1, 2014, in downtown Fairbanks, Alaska. (AP Photo/ The Daily News-Miner, Sam Harrel)
Sam Harrel
Craig Medred