Athens airport is inherently safe but with all the additional security measures lately, there couldn't have been anything untoward placed on anything that remotely resembles an aircraft or on anything else within a radius of 100nm for that matter
According to the Athenian News Agency, the ac departed around 0800Z for KJFK following an allnight search of luggage and airplane. Passengers stayed in nearby hotels. (What's the nightlife like in the area?) It was also reported that the ac diverted to STN on instruction from the authorities as STN was "better trained and equipped" to handle cases such as this one
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