Think you can stay underwater for 31 days? Cousteau's grandson is on it

Can Fabien Cousteau break his oceanographer granddad Jacques Cousteau's 30-day record for the longest underwater stay off the US coast? He certainly thinks so, declaring "Splashdown!" upon entering the blue.

Fabien Cousteau, 46, and eight other aquanauts dove off the state of Florida’s Key Largo coast, where they will conduct experiments in a bus-sized lab named Aquarius some 20m underwater and work with documentary filmmakers.