ROCHESTER, Minn. — Mark McKenzie was 11 years old when Jim Peterson saved his life.

McKenzie had fallen into the Zumbro River while on a rafting adventure with other Boy Scouts. McKenzie was on the verge of drowning when he felt the “really strong arm” of his 16-year-old scoutmaster take hold of his skinny arm and haul him out from underneath the swiftly churning current.