"The safety gap is so large, in fact, that planes would still be safer than cars even if the threat of terrorism were unimaginably worse than it actually is: An American professor calculated that even if terrorists were hijacking and crashing one passenger jet a week in the United States, a person who took one flight a month for a year would have only a 1-in-135,000 chance of being killed in a hijacking--a trivial risk compared to the annual 1-in-6,000 odds of being killed in a car crash."
— Daniel Gardner (The Science of Fear: Why We Fear the Things We Shouldn't--and Put Ourselves in Greater Danger)