JOCKO WILLINK served 20 years as a Navy SEAL. He was in combat in Iraq during the Battle of Ramadi, a conflict that resulted in numerous medals for his efforts. After his tours, Willink served as a Navy SEAL instructor before forming Echelon Front with Leif Babin, a leadership training group that uses the lessons and expertise the pair learned as SEALs to train leaders beyond the military. Willink lives in San Diego, California.