These programs have continued to be key sources of funding for top research scientists in the fields of high-energy physics, supercomputing/computation, advanced materials, and many other critical science and engineering disciplines—funding which indirectly supports other research work by top scientists, and which was most politically viable to fund within the Military budget of the United States environment.[9] It was renamed the Ballistic Missile Defense Organization in 1993, and then renamed the Missile Defense Agency in 2002.[10] The current director is U.S. Navy Vice Admiral Jon A. Hill.[11]