US tightens security measures after bomb plot

The US has tightened its flying restrictions after Saturday\'s failed bomb attack on New York\'s Times Square.



Officials say airlines must now check no-fly lists within two hours of being told of updates.



The move is aimed at stopping known suspects from boarding planes, as 30-year-old Faisal Shahzad did on Monday.



According to court papers, the Pakistan-born US citizen admitted trying to detonate the Times Square car-bomb, having learnt how to make it in Pakistan.



He faces terrorism and explosives charges, including attempting to use a weapon of mass destruction and transporting an explosive device with the intent to kill.



Airline security staff apparently failed to check the latest version of the no-fly list which included his name when he checked in.



After last-minute checks by customs agents, the flight was stopped as it taxied to the runway, and he was pulled off the plane.



Before now, airlines had been required to check for updates to the no-fly list each day.