For some easy to understand math, there are roughly 30,000 commercial flights each day. That's over ten million flights a year, and over one hundred million flights over the last decade. During that time span, an entire 4 planes were hijacked. That's 4 out of 100,000,000, or 1/25,000,000. In contrast, the odds of winning the British national lottery is 1/14,000,000. The chances of being hit by lightning in any given year is 1/280,000. I mean, there's nothing wrong with being cautious, but if you're going to be scared of everything that has a 1 in 100 million chance of happening, you're not going to live a very productive life.