BBC News - Boeing 747 survives simulation bomb blast
A test explosion on a Boeing 747 suggests that a US Christmas Day flight would have landed safely even if a bomb on board was detonated successfully.
The test plane's fuselage did not break in the controlled blast, which used the same amount of explosive allegedly carried by Umar Farouk Abdulmutallab.
Mr Abdulmutallab, 23, has denied attempting to murder 289 people by trying to blow up a flight to Detroit with a device hidden in his underwear.
The experiment was carried out by UN explosives expert Dr John Wyatt and analysed by air accident investigator Captain J Joseph.
It looks to me from the video as if the aircraft was not pressurised. Surely that would have an impact on how effective the bomb would have been?