The senseless and horrific killings last week on the campus of Virginia Tech University reinforced an uneasy feeling many Americans experienced after September 11th: namely, that government cannot protect us. No matter how many laws we pass, no matter how many police or federal agents we put on the streets, a determined individual or group still can cause great harm. Perhaps the only good that can come from these terrible killings is a reinforced understanding that we as individuals are responsible for our safety and the safety of our families.