Imagine living in a box at the bottom of the sea for a month at a time. Locked away in a saturation chamber, plumbed to depths of more than 500 feet, this has been David Beckett's love, life, and work for all his adult life. Destined to become a pig farmer in the late 1960s, a twist of fate saw David become an air diver, and within a short space of time, he progressed to saturation diving. He would brush with death on more than one occasion - not...