Robert J. Goldston is a professor of Astrophysical Sciences at Princeton University. He was the director of the US Department of Energy’s Princeton Plasma Physics Laboratory from 1997 to 2009. He is an active researcher both on fusion energy and on arms control and non-proliferation. He is a co-developer of the “Zero Knowledge” protocol for warhead verification. He also works on an unattended monitoring system for uranium hexafluoride flows in gas centrifuge enrichment plants, as well as robotic systems for detecting neutron fields in enrichment plants and warhead storage facilities. He is associated faculty with Princeton University’s Woodrow Wilson School Program on Science and Global Security, with its Department of Mechanical and Aerospace Engineering, and with the Princeton Environmental Institute.