Photos Courtesy of Tough Mudder A member of the California National Guard, Bill “Big Sarge” Hansen was injured while serving a tour in Iraq in February of 2009. An accident involving an IED explosion caused him to suffer three cracked bones in his neck, herniated disks in his back, a traumatic brain injury and further injuries to his knee and shoulder. “I was pretty … [Read more...] about Tough Mudder to challenge LA