 Qantas undertook a full security review following the incident and promised to secure the flightdeck doors on all of their aircraft by 1 November.The airline dismissed the suggestion of armed sky marshals on each flight as too expensive, and a full body search of passengers to detect wooden objects as unfeasible.In an interview with the Australian Federal Police, Robinson admitted attempting to hijack the plane, which he intended to crash into the Walls of Jerusalem National Park in Tasmania – an action intended to release the devil from his lair and bring about Armageddon.