Blowing stuff up is usually easier than fixing stuff. Do we have cold fusion yet (not Macromedia :)? Do we have fusion reactors yet? In fact, we seem to be slowly losing ability to have any use of nuclear energy except blowing stuff up - it's next to impossible to get a new nuclear plant built, and old ones are being closed down. By the same 2100 we may have the atomic bomb as the only way to use nuclear energy we have. And still no fusion.