During the combat operations phase of Operation Iraqi Freedom (OIF), Patriot air and missile defense units were involved in two fratricide incidents involving coalition aircraft. Patriot's unacceptable fratricide rate during OIF (18% of engagements) prompted the commanding general of the Army Air and Missile Defense Center to request a high-performance-oriented assessment of the fratricide incidents to complement the official Army board if inquiry investigation. This report summarizes the results and ...