According to Dennis King, Winterberg shared his ideas on beam weapons with the U.S. Air Force and he speculated on the subject in publications for the Fusion Energy Foundation (FEF), a part of the Lyndon LaRouche movement. The FEF published a book of Winterberg describing the design of the hydrogen bomb, with the hope of getting research in inertial confinement fusion declassified. Winterberg also contributed articles and interviews to the FEF magazine, "Fusion", and its successor magazine, "21st Century Science and Technology". He also participated in a 1985 conference jointly sponsored by the FEF and the Schiller Institute, speaking on the topic of X-ray lasers, the Strategic Defense Initiative and interstellar travel. The conference attracted a number of scientists interested in promoting fusion scientific research; Winterberg was never a member of any of LaRouche's political organisations.