This 192-city survey conducted by the U.S. Conference of Mayors addresses issues related to 1) the level of interoperable communications across city, state, and federal public safety agencies; 2) obstacles to interoperability and whether the federal mechanism for distributing Homeland Security funds by states delayed city interoperable investments; 3) investment required for a city to become fully interoperable and whether and how much federal funding is expected or has been made available to aid city interoperable implementation. The results of this survey were published in June 2004.