We already know there are vulnerabilities within our response tactics. Although it is good idea to ensure we work towards total readiness, there is no way of knowing where and when the next attack will happen. That being said, the majority of terror attacks especially the larger scale incidents are perpetrated by US citizens or homegrown terrorist cells. We should spend the money that would be used on this exercise on our local first responders who will be the first ones to respond to any act of terror on US soil. This exercise is a gross waste of resources in a national level.