US authorities are investigating how a man accused of trying to blow up a passenger plane managed to get on board.
Nigerian Umar Abdulmutallab was charged last night with attempting to detonate a device on a flight to Detroit.
It has emerged officials were aware of him after his father, who's a top Nigerian banker, warned them last month about his son's extreme views.
US sources have confirmed that a file was opened, but say the information did not warrant placing the accused on a "no-fly" list.
Airports worldwide have now beefed up security after the alleged attack.
Passengers will have to stay in their seats during the last hour of flights and they'll also have reduced access to their hand luggage.
Security experts believes further changes will have to take place.