IT was the tragedy they said should never happen again. Thirty years ago 167 men died after a gas leak – so loud workers heard it hissing – turned their North Sea platform in to a fireball. Yet just this spring Britain’s safety watchdog said recent hydrocarbon releases had brought rigs “perilously close to disaster” . http://www.heraldscotland.com/business_hq/16326022.safety-fears-30-years-after-piper-alpha/