A week after the Virginia Tech massacre, it's as predictable as the post-tragedy media blitz... the post-tragedy gun debate. The "what-ifs" abound: what if Seung Hui Cho hadn't been able to get the guns? What if the students could have carried their own firearms? Surprisingly, the gun laws vary from state to state, and from campus to campus. Hindsight is 20/20, but when it comes to guns, the target is unclear... what do you think the right policy is, given that these terrible incidents don't actually happen that often?