http://en.wikipedia.org/wiki/Category:Airliner_bombings http://en.wikipedia.org/wiki/Category:Airliner_bombings I suppose the time when people could do that is

http://en.wikipedia.org/wiki/Category:Airliner_bombings http://en.wikipedia.org/wiki/Category:Airliner_bombings I suppose the time when people could do that is at earliest, the most recent of those incidents.