Andy Stumpf believes that the most important element of SEAL training is mental control rather than physical ability.

“I tell people the muscles that matter in buds are the ones from the neck up, not the ones from the neck down.”

Delta Force selection is designed to be an intense individual effort that tests both physical endurance and mental heart.

“Delta Force selection is very unique in that you don't go through as a group. You go through as an individual. It's an individual effort, right?”