The Defense Department is developing a concept of operations for a rapidly deployable air defense package that can be shifted around the United States to defend the skies from cruise missiles and other low-flying threats at high-profile national events. Gen. Richard Myers, chairman of the Joint Chiefs of Staff, has directed Adm. Timothy Keating, head of the North American Aerospace Defense Command, to lead the development of the CONOPS. The goal is to quickly determine what package of existing surveillance,...