"I'll ask myself for the rest of my life what else I could have done."
Those are the words from one of Cho Seung Hui's teachers at Virginia Tech University.
She's one of several people who tried to help this deranged person or at least to prevent him from causing harm to anyone.
Perhaps there was no way to disrupt the behavior of this sick individual in a way that would have prevented this massacre.
As we reflect on this event, our attitude should be that we will work to derail the next would-be madman. You may blame our nation's gun control laws. You may believe this could have been prevented if we had a different attitude toward mental health issues. You might think the answer is to reduce the amount of violence young people are exposed to. You may want to confront this type of threat with increasing toughness. You may think the answer lies in increasing kindness.
Whatever your view, let's vow as citizens of a great nation not to meet this challenge with indifference.