3D Research Corporation and the University of Alabama in Huntsville have teamed to offer advanced high-energy gel propellants for exoatmospheric interceptors. High energy gelled propellants are required to improve the performance envelopes of future MDA missile interceptors. We will theoretically investigate a number of gelled fuel-additive combinations to determine the best potential performers, and select the most promising combinations for experimental investigation. This approach utilizes the best combination of available data through experimental analysis with the advantages of a strong experimental program. We will report the results of theoretical analysis of numerous gel-additive combinations, and specific data obtained from kinetics studies of the most promising combinations. Those gel-additive and oxidizer combinations which show the most promise for performance and systemization will be selected for detailed testing small-scale motors in Phase II. Future interceptor systems currently on the drawing board, such as the Kinetic Energy Interceptor, are posed to accept best in class propellants for current and future upgrades. Our team has a history of high-energy propellant development and the proper analytical and experimental tools to efficiently meet the needs of the government