The Air Force said its nuclear missile capsules were 'free of health hazards.' But documents show the hidden toxic risks missileers were exposed to on the job.

• Nuclear missile crews have worked in underground capsules and silos since the 1960s.
• The Air Force said the nuclear missile capsules were safe from occupational hazards.
• But decades later, hundreds of current and former missileers self-reported cancer diagnoses.

A large pool of dark liquid festering on the floor. No fresh air. Computer displays that would overheat and ooze out a fishy-smelling gel that nauseated the crew. Asbestos readings 50 times higher than the Environmental Protection Agency's safety standards.