From the New York Times, September 30, 2003:
Marshall N. Rosenbluth [was] a pioneer in unleashing and taming nuclear fusion, the force that powers the sun and stars. . . . Known as the dean of plasma physics, Dr. Rosenbluth was a world leader in trying to turn the hot plasmas of nuclear fusion into nearly limitless electrical power. . . . He worked to foster international teamwork in fusion and physics research. He was a central figure in the International Center for Theoretical Physics in Trieste, Italy, and of the International Thermonuclear Reactor, a program to demonstrate the feasibility of using fusion to generate power.