Rush D. Holt is chief executive officer of the American Association for the Advancement of Science (AAAS). He is a research physicist, who also served for eight terms in the US House of Representatives as congressman from New Jersey’s 12th District. Holt previously held positions as a teacher, and as an arms control expert at the US State Department. From 1989 until 1998, he served as assistant director of the Princeton Plasma Physics Laboratory. As a result of his alternative-energy research, Holt in 1981 was issued a patent on an improved technology for harnessing energy from sunlight.