I just had a talk with my son Jack. A real talk. The kind you hope you can have in your life with anyone, let alone your own child."Why is it that the so many of the people who changed the world end up getting killed?" he asked. "Martin Luther King, Anwar Sadat, John Kennedy..." his eyes look sad and lost."Why is it this world can be so beautiful, but some people can be so evil?"I want to answer him, so his ten year old heart doesn't hurt more than it already does. But right now, I'm at a loss for words.