a country reeling from the shootings and years of divisive politics. but in the long run, how much will it matter? there is a dark side to what happened in tucson, and a very dark side. and sarah palin says there are a record number of death threats against her since the arizona shootings, and palin's security is looking to step up the security, and this is ugly and begs the question of what we are becoming in this country. here is the question then, will the tucson massacre change the tone of the political debate in this country. >> let's hope so. go cnn.com/caffertyfile. >> we hope so, too, jack. shooting suspect jared loughner behaved so strangely at his community college that faculty and students alerted the police. they demanded he get a mental health evaluation. so what can be done to prevent another tragedy like what happened in tucson?