Before anyone starts in with the "Well, America is the only country to ever actually use them!" bit, ask yourselves if someone like the Ayatollah Khameini would use these devices if he ever acquired them. Ask if Ahmadenijad's statements about wiping Israel off the map should be taken seriously. Watch these videos and ask yourself what terrorists might do with nuclear devices.
Now I know, I know. Somebody out there is going to call me an alarmist. That's not what I'm going for here, any more than I'm sure alarmism isn't what they're going for when they tell us global warming is going to put us into another ice age if we don't stop it in ten years (though it's odd that I've been hearing that for twenty-five years or more...). This is not meant to be alarmist any more than those people who try to convince us all that we're currently under attack by talk radio. Surely those people don't want to use scare tactics to try and censor free speech, do they? Well, I'm not being alarmist, either. I'm just showing you kind readers the consequences of not taking a particular threat seriously. Consider this:
http://www.liveleak.com/view?i=cab_1177525974
That one can fit inside the trunk of a compact car these days.
http://www.liveleak.com/view?i=a4c6560e8d
This one would fit inside an artillery shell. Actually, that's exactly what it did. This was fired from a cannon.
http://www.liveleak.com/view?i=39f4a96e5d
Compilation. Look at the size of the explosion on Bikini Atoll in comparison with the battleships nearby.