The Posse Comitatus Act of 1878 (PCA) and as amended restricts the use of the Army or the Air Force for law enforcement purposes. Hurricane Katrina and the events of September 11, 2001, combined with the potential use of a weapon of mass destruction (WMD) in a domestic terrorist event have brought the PCA into the spotlight for review. Should Congress repeal the PCA, leave PCA "as-is," or modify the PCA? This paper provides background on the issue of the use of the military for law enforcement and makes the case that policy and not necessarily statutory guidance drives the use of the military in the domestic venue for rapidly responding to a wide range of crises.