While we all know in theory that fatal car accidents happen countless times a day -- every day -- across the country, we tend not to think about the possibility that one of these accidents will happen to us or someone we love. Even the act of putting on a seat belt has become automatic. Most of us do it not because we're afraid of crashing, but because it's a well-ingrained habit. But the unfortunate truth is that none of us is guaranteed an accident-free journey through life. Driving carefully is important, but it doesn't prevent a fatal collision with a driver who might not be as cautious.