Not that its very likely in the USA; with a few exceptions rail service is abysmal. It took me 48 hours to travel from Nevada to Chicago last time I took the train, what with mechanical breakdowns and other unexplained delays. Lost my luggage too. Never again.
So now they focus on temporary gates and profiling - which turns out to be much more efficient than random screening.
At the Paris side, I was again approached by staff, this time offering me a Halal meal...
Bombs in london and madrid caused hundreds of lives lost or serious injuries, bombs in the pakistan/india region often claim thousands.
The threat (as also mentioned here) is that a hijacked plane is, in reality, a massive missile and, to use the phrase, a true weapon of mass destruction. This however was resolved after 9/11 with new cockpit procedures and more alert passengers. (c.f. Bruce Schneier's blog for more)