“You can't imagine what the interior of sixteen or eighteen cubic feet is like with all of these people screaming, and yelling, and talking, and howling. [...] Not to mention the radio squealing. And the bullets flying. And explosions going up. You just can't imagine the chaos that goes through your head. And it requires immense concentration, and effort, to focus on what you job is. [Tom Kelley, Vietnam Medic from December 1967-December 1968, speaking about events inside the medevac helicopters]”