Sometimes, a person who is mentally ill finds a way to become armed and their insanity plays out on the world stage.
Working in the world of risk management, most tragedies can be prevented. Unfortunately, if you exercised the main tool of risk management which is "risk avoidance" you would never leave the house.
The Virginia Tech massacre is just horrendous. Period. The VT community needs time to heal, in terms that only they can define.
In the meantime, both sides of the gun control issue should take a cool off period before they get into the fray.