PROVIDENCE, R.I. - We are stunned. We are outraged. As a nation, we are questioning laws on gun control, questioning how such a thing can happen. These are all appropriate responses to the tragedy in Newtown, Conn. But there is a repercussion to all this that will continue long after laws are changed and life, unbelievably, gets back to normal: the grief of the parents of the 20 children killed. How many times have I heard that this is a parent's worst nightmare? As someone who has lived the nightmare of losing a child, I know that the enormous hole left behind remains forever.