Also, I want to discuss the "has made plane travel impossible", I'm sorry but that is just bullshit.
How many planes do you think have been hijacked and crashed due to terrorist intervention since September 11th? I checked, the answer is none (source). You could argue more could have potentially been hijacked, but the plans were foiled, despite this the answer is still none. But in that time millions upon millions of planes have made journeys.
The chances of you getting on a plane that has been hijacked by terrorists is insignificant, like a one in a billion chance. I would almost go as far to say that you would be far more likely to have your car stolen on the journey to the Airport, than you are to get on a hijacked plane.