Our faith sheds light on the question. It seems we are especially called to be in solidarity with the victims of that tragedy, dead or alive, and their families. They have experienced horrendous loss and will know the pain for generations to come. They are in need of our prayer and any other assistance we can provide. We are challenged to seek justice.
Justice demands a response, but tolerates neither revenge nor retaliation.
As we move through the effects of this disaster, it is important to be in touch with our feelings and to own them. They are not rational, but rather, emotional. Hopefully, neither our feelings nor the act of an enemy will be given control over our lives. We don't want a terrorist determining our behavior. The quality of our response will witness our mettle as a nation.