Five years ago today, 19 guys with box cutters flew hijacked planes into the World Trade Center, the Pentagon, and a field in Pennsylvania. They killed themselves in the process, along with a little under 3,000 other people. It's hard, at least for me, to understand exactly why they did this, and what, if anything, they thought they would accomplish. I don't know if I'll ever understand it, actually, or if I really want to put myself into whatever frame of mine is necessary to do so. In any case, they did it. Five years ago today, a young mother sat on a plane next to her two year old daughter, knowing that both of their lives would end in a few short minutes. A man stayed behind in one of the towers with a coworker who was wheelchair bound, knowing that it would probably mean his life. Faced with a choice of incineration or jumping to their deaths, numbers leapt from the top of the towers. Some held hands as they did so. Some were on fire as they did so. Hundreds o...