The Missile Defense Agency estimated in 2008 that the potential costs of fielding ballistic missile defenses in Europe would be more than $4 billion through 2015. Planned ballistic missile defenses in Europe are intended to defend the U.S., its deployed forces, and its allies against ballistic missile attacks from the Middle East. They are expected to include a missile interceptor site in Poland, a radar site in the Czech Republic, and a mobile radar system in a still-to-be-determined European location. This report evaluates DoD¿s plans for missile defense sites in Europe and addresses to what extent DoD has: (1) planned for the sites' implementation; and (2) estimated military construction and long-term operations and support costs. Charts and tables.