They were US citizens. And yes, you have to be careful what you say in airports and planes...BUT...there is ALWAYS a public announcement AND very clearly posted signs, going at the airport stating that ANY comments will be taken seriously. Also that any unaccompanied bags should be reported to airport authorities.

I shouldn't take more than just one person to alert the authorities...what if it actually HAD been someone who was plotting and only one person heard the conversation? If they didn't report it...disaster...

I also don't think anyone would have really minded missing the activities for New year's eve when safety is concerned.

Grant me the senility to forget the people I never liked,the good fortune to run into the ones I do,and the eyesight to tell the difference.