SCIENTIFIC RATIONALE: CLUSTERS OF GALAXIES ARE THE LARGEST VIRIALIZED STRUCTURES IN THE UNIVERSE AND MERGERS BETWEEN CLUSTERS ARE THE MOST ENERGETIC EVENTS SINCE THE BIG BANG INVOLVING 10 64 ERGS. MERGER SHOCKS ARE THE PRIMARY HEATING MECHANISM OF THE INTRACLUSTER MEDIUM (ICM) AND PROVIDE EXCELLENT LABORATORIES FOR ASSESSING THE INJECTION OF BOTH THERMAL AND NON-THERMAL ENERGY INTO THE ICM. WHILE MOST OF THE SHOCK ENERGY DIRECTLY HEATS THE GAS SOME OF ITS ENERGY ALSO ACCELERATES RELATIVISTIC PARTICLES. THIS NONTHERMAL PHENOMENON HAS BEEN REVEALED BY OBSERVATIONS OF MPC-SCALE SYNCHROTRON RADIO HALOS AND RADIO RELICS.