sentences:  In the 1980s, as chairman of the Federation of American Scientists, Von Hippel partnered with Evgenyi Velikhov in advising Mikhail Gorbachev on the technical basis for steps to end the nuclear arms race.From 1993 to 1995, he was the Assistant Director for National Security in the White House Office of Science and Technology Policy.He now serves on the National Advisory Board of the Center for Arms Control and Non-Proliferation, the research arm of Council for a Livable World.