Bruce Backus (left), assistant vice chancellor of environmental health and safety, and U.S. Environmental Protection Agency Administrator Stephen L. Johnson tour the laboratory of Himadri Pakrasi, Ph.D., the Endowed Professor of Biology in Arts & Sciences and professor of energy in the School of Engineering and Applied Science Oct. 11. Johnson visited campus to announce a new national compliance assistance center for colleges and universities. He recognized the leadership WUSTL has shown managing hazardous waste and also praised the active role Backus has played in higher education laboratory safety.