Terror concerns ground flights
The US Government said it had fresh indications of al-Qaida’s continued interest in targeting commercial planes flying to the US.
US officials have been concerned for some time that al-Qaida wants to use chemical, biological or radiological weapons aboard an airplane. However, the threat information that led to the cancelled flights this weekend did not indicate a specific method to bring down a plane or spread an illness such as smallpox, said a US official speaking on the condition of anonymity.