The US military is very dependent on satellites. The existing satellite architecture used has single point failures to existing recognized threats. A concept that could provide a significant part of the solution of how the US as well as other states can overcome such vulnerabilities is discussed. The prescription centers on a new satellite architecture --the 'Multi-tiered Microsatellite Constellation Architecture' (MMCA) -- which reduces risks to space assets by increasing system redundancy, modularity and dispersion through the use of microsatellite constellations in several orbital tiers. An example constellation design is given for each of the five major contemporary military space uses -- early warning, reconnaissance, signals intelligence, military communications and navigation. The scheme is placed in the context of other complimentary elements that are likely to be necessary to enable security of space assets, in particular: protection of space systems; responsive space access; terrestrial alternatives; space surveillance; treaties; and verification means thereof. Since the Chinese anti-satellite (ASAT) test, the response of the US military in part has been to re-double efforts to develop Operationally Responsive Space (ORS). Whilst ORS is a key ingredient, it must be complemented by a more secure satellite architecture. In addition to dealing with satellite vulnerabilities, the talk will discuss issues relating to space-based weapons and their effectiveness.

William Marshall is based in the Small Spacecraft Office at NASA's Ames Research Center in California. He holds a PhD in Physics from the University of Oxford, U.K., where his thesis centred on an experimental proposal to create macroscopic mass quantum superposition states. He conducted two years of his research at the University of California in Santa Barbara. He holds a degree in Physics with Space Science and Technology (MPhys) from the University of Leicester, UK. He has held placements at the European Space Agency, NASA's Jet Propulsion Laboratory, Marshall Space Flight Center and the Parliamentary Office of Science and Technology (POST) in London. Will's work at NASA centers on mission planning, in particular trajectory analysis, and spacecraft testing for a variety of microsatellite missions, focusing on lunar orbiters and landers. He is working on a project on the topic of space traffic management. Will serves on the Governance Group of the Space Security Index research project and also holds positions of non-resident fellow at both the Space Policy Institute (SPI) of the George Washington University and the Belfer Centre for Science and International Affairs, Kennedy School of Government, Harvard University. In these capacities, Will has published on strategic benefits and costs of the deployment of space weapons and more broadly the increasingly important role that space is playing in global security issues. Will is the Global co-Chair of the Space Generation Advisory Council to the United Nations Programme on Space Applications (SGAC), which represents the views of students and young professionals interested in space to the UN and space agencies around the world.

David Montague, an independent consultant, is retired President of the Missile Systems Division at Lockheed Martin Missiles and Space. A member of the NAE, his background is in military weapon systems, particularly in regard to guidance and control of submarine-launched weaponry. His experience has focused on both tactical and strategic strike systems, as well as on the requirements for, development of, and policy issues related to defense systems to protect against weapons of mass destruction. His recent research interests include the area of electric vehicles powered by battery or fuel cells integrated with induction drive high-speed highway automatic headway and vehicle control. Mr. Montague is a fellow of the American Institute of Aeronautics and Astronautics, and has served on numerous scientific boards and advisory committees, to include task forces for both the U.S. Army and Defense Science Board. He currently serves as a member of the Naval Studies Board.

Brent Durbin (speaker) is a PhD candidate at the University of California, Berkeley, and a predoctoral fellow at CISAC. He is also a 2007-2008 dissertation fellow at the Institute for Global Conflict and Cooperation. In his dissertation, Durbin explains the political and policy dynamics of U.S. intelligence adaptation. His broader research interests fall at the intersection of organization theory, decision-making, and national security policy. Durbin has served as a visiting fellow at the University of Cambridge (UK) and The George Washington University, and as a senior staff member for U.S. Senator Patty Murray. He holds degrees from Oberlin College, Harvard University, and the University of California, Berkeley.

Paul Stockton (discussant) is a senior research scholar at CISAC. He was formerly the associate provost at the Naval Postgraduate School in Monterey, California, and was the former director of its Center for Homeland Defense and Security. His teaching and research focuses on how U.S. security institutions respond to changes in the threat (including the rise of terrorism), and the interaction of Congress and the Executive branch in restructuring national security budgets, policies and institutional arrangements. Stockton joined the faculty of the Naval Postgraduate School (NPS) in August 1990. From 1995 until 2000, he served as director of NPS's Center for Civil-Military Relations. From 2000-2001, he founded and served as the acting dean of NPS's School of International Graduate Studies. He was appointed associate provost in 2001.

During the strategic modernization program that the Soviet Union undertook in the 1970s, it deployed a large number of multiple-warhead ballistic missiles. This deployment raised concerns in the United States about vulnerability of its land-based missile force and was one of the factors that contributed to the military buildup that the United States undertook in the late 1970s-early 1980s. The newly available documents that contain evidence of the Soviet missile programs demonstrate that the "window of vulnerability" did not exist and provide some insight into the Soviet modernization program.

Pavel Podvig joined CISAC as a research associate in 2004. Before that he was a researcher at the Center for Arms Control, Energy and Environmental Studies at the Moscow Institute of Physics and Technology (MIPT). He worked as a visiting researcher with the Security Studies Program at MIT and with the Program on Science and Global Security at Princeton University, and he taught physics in MIPT's General Physics Department for more than ten years.

Podvig graduated with honors from the Moscow Institute of Physics and Technology in 1988, with a degree in physics. In 2004 he received a PhD in political science from the Moscow Institute of World Economy and International Relations.

His research has focused on technical and political issues of missile defense, space security, U.S.-Russian relations, structure and capabilities of the Russian strategic forces, and nuclear nonproliferation. He was the head of the Russian Strategic Nuclear Forces research project and the editor of a book of the same title, which is considered a definitive source of information on Russian strategic forces.