Rachel Bronson

Rachel Bronson is the Executive Director and Publisher of the Bulletin of the Atomic Scientists where she oversees the publishing programs, the management of the Doomsday Clock, and a growing set of activities around nuclear weapons, nuclear energy, climate change and emerging technologies. Before joining the Bulletin, she served as vice president for Studies at The Chicago Council on Global Affairs, adjunct professor of “Global Energy” at the Kellogg School of Management, and senior fellow and director of Middle East studies at the Council on Foreign Relations, among other positions. Her book, Thicker than Oil: America’s Uneasy Partnership with Saudi Arabia (Oxford University Press, 2006), has been translated into Japanese and published in paperback. Her writings and commentary have appeared in outlets including Foreign Affairs, The New York Times, the Washington Post, PBS News Hour, The Charlie Rose Show, and The Daily Show. Bronson has served as a consultant to NBS News and testified before the Congressional Anti-Terrorist Finance Task Force, Congress’ Joint Economic committee, and the 9/11 Commission.

Eugenia Cheng

Eugenia Cheng is Scientist In Residence at the School of the Art Institute of Chicago. She won tenure in Pure Mathematics at the University of Sheffield, UK, where she is now Honorary Fellow. She holds a PhD in pure mathematics from the University of Cambridge. Alongside her research in Category Theory and undergraduate teaching her aim is to rid the world of “math phobia”. Her first popular math book, How to Bake Pi, was published by Basic Books in 2015 to widespread acclaim. Eugenia was an early pioneer of math on YouTube and her videos have been viewed around 10 million times to date. Her next popular math book, Beyond Infinity was published in 2017 and has been shortlisted for the Royal Society Insight Investment Science Book Prize 2017. Eugenia is a math columnist for the Wall Street Journal, a concert pianist and founder of the Liedertube.

Lee Francis

Lee Francis is the Chair of the Bulletin's Governing Board. An internist and the CEO of Erie Family Health Center, Francis is assistant clinical professor of internal medicine at Northwestern University's Feinberg School of Medicine. He is a past president of Physicians for Social Responsibility (PSR), a national organization dedicated to the prevention of violence and nuclear war, and continues to serve on its Board of Directors.

Elizabeth Kolbert

Elizabeth Kolbert is a member of the Bulletin's Science and Security Board. Kolbert has been a staff writer at The New Yorker since 1999 and has written extensively on science and climate change to great acclaim. Her most recent book, The Sixth Extinction, won the 2015 Pulitzer Prize for general nonfiction. Kolbert is also known for her book Field Notes From a Catastrophe, based on her three-part series on global warming, “The Climate of Man,” which won the 2006 National Magazine Award for Public Interest and the AAAS Advancement of Science Journalism Award. She is also a recipient of a Heinz Award (for educating the public about environmental issues) and a Guggenheim Fellowship.

Lawrence Krauss

Lawrence Krauss is the Chair of the Bulletin's Board of Sponsors. Krauss is the director of the Origins Project at Arizona State University and Foundation Professor at ASU’s School of Earth and Space Exploration and Physics Department. Krauss is an internationally known theoretical physicist with wide research interests, including the interface between elementary particle physics and cosmology, where his studies include the early universe, the nature of dark matter, general relativity and neutrino astrophysics. He has written 10 books, including the international best-sellers, The Physics of Star Trek, and A Universe from Nothing, and his upcoming book, The Greatest Story Ever Told--So Far due out in March. He writes regularly for magazines and newspapers including the New York Times and the New Yorker, and frequently appears on radio and television, as well as, most recently, in several feature films. Among his numerous awards for research and outreach, he was awarded the 2012 Public Service Award from the National Science Board for his contributions to the public understanding of science.

Herb Lin

Herb Lin is a member of the Bulletin's Science and Security Board. Lin is senior research scholar for cyber policy and security at the Center for International Security and Cooperation and Research Fellow at the Hoover Institution, both at Stanford University. He is particularly interested in the use of offensive operations in cyberspace, especially as instruments of national policy.

Suzet McKinney

Suzet McKinney is a member of the Bulletin's Science and Security Board. McKinney is the Executive Director of the Illinois Medical District Commission. She is the former Deputy Commissioner of the Bureau of Public Health Preparedness and Emergency Response at the Chicago Department of Public Health, where she oversaw the emergency preparedness efforts for the department and coordinated those efforts within the larger spectrum of Chicago’s public safety activities. A sought-after expert in her field, McKinney also provides support to the U.S. Department of Defense, Defense Threat Reduction Agency, to provide subject matter expertise in biological terrorism preparedness to international agencies.

John Mecklin

John Mecklin is the editor-in-chief of the Bulletin of the Atomic Scientists. Previously, Mecklin was editor-in-chief of Miller-McCune (since renamed Pacific Standard), an award-winning national magazine that focused on research-based solutions to major policy problems. Over the preceding 15 years, he was also: the editor of High Country News, a nationally acclaimed magazine that reports on the American West; the consulting executive editor for the launch of Key West, a regional magazine start-up directed by renowned magazine guru Roger Black; and the top editor for award-winning newsweeklies in San Francisco and Phoenix. In an earlier incarnation, he was an investigative reporter at the Houston Post and covered the Persian Gulf War from Saudi Arabia and Iraq. Writers working at his direction have won many major journalism contests, including the George Polk Award, the Investigative Reporters and Editors certificate, and the Sidney Hillman Award for reporting on social justice issues. Mecklin holds a master in public administration degree from Harvard's Kennedy School of Government.

Robert Rosner

Robert Rosner is the Co-Chair of the Bulletin's Science and Security Board. Rosner is the William E. Wrather Distinguished Service Professor in the Department of Astronomy and Astrophysics and Physics at the University of Chicago. Rosner recently stepped down as Director of Argonne National Laboratory, where he had also served as Chief Scientist. His research is mostly in the areas of plasma astrophysics and astrophysical fluid dynamics and magnetohydrodynamics (including especially solar and stellar magnetic fields); high energy density physics; boundary mixing instabilities; combustion modeling; applications of stochastic differential equations and optimization problems; and inverse methods.

Jennifer Sims

Jennifer Sims is a member of the Bulletin's Science and Security Board. Sims is currently a senior fellow at the Chicago Council on Global Affairs and is writing a book on intelligence in international politics. She is also a consultant on intelligence and homeland security for private corporations and the US government. In 2008, the president of the United States appointed her to the Public Interest Declassification Board, which advises the president on the declassification policies of the US government. Sims received her MA and her PhD from Johns Hopkins University’s School of Advanced International Studies. In 1998, Sims received the intelligence community’s highest civilian award, the National Distinguished Service Medal.

Sharon Squassoni

Sharon Squassoni is a member of the Bulletin's Science and Security Board. Squassoni currently directs the Proliferation Prevention Program at the Center for Strategic and International Studies in Washington, DC. She has specialized in nuclear nonproliferation, arms control and security policy for three decades, at the Arms Control and Disarmament Agency, the State Department, and the Congressional Research Service. She has also held positions at the Institute for Defense Analyses, the Carnegie Endowment for International Peace, and Newsweek magazine. She received a Bachelor of Arts degree from the State University of New York at Albany, a master’s in public management from the University of Maryland, and a master’s in national security strategy from the National War College.

Han Sung-Joo

Minister Han is Honorary Chairman of the International Policy Studies Institute of Korea and Professor Emeritus at Korea University. He served as the Minister of Foreign Affairs (during the first North Korean nuclear crisis in 1993-1994), UN Secretary-General’s Special Representative for Cyprus (1996-1997), a member of the UN Inquiry Commission on the 1994 Rwanda Genocide (1999), Chairman of the East Asia Vision Group (2000-2001), Ambassador of the Republic of Korea to the United States (2003-2005), and Acting President of Korea University (2002, 2006-2007). Previously, he taught at City University of New York (1970-1978) and was a visiting professor at Columbia University (1986-1987) and Stanford University (1992, 1995). He was also a distinguished fellow at the Rockefeller Brothers Fund (1986-1987). His English publications include Korean Diplomacy in an Era of Globalization (1995), Korea in a Changing World (1995), and Changing Values in Asia (1999). He has many publications in Korean, including Nam Gwa Puk, Kurigo Sekye (“The Two Koreas and the World”) (2000). Minister Han is a graduate of Seoul National University (1962) and received a PhD in political science from the University of California, Berkeley (1970).

David Titley

David Titley is a member of the Bulletin's Science and Security Board. Titley is a Professor of Practice in Meteorology and a Professor of International Affairs at the Pennsylvania State University, and the founding director of Penn State’s Center for Solutions to Weather and Climate Risk. He served as a naval officer for 32 years and rose to the rank of rear admiral. Dr. Titley’s career included duties as commander of the Naval Meteorology and Oceanography Command; oceanographer and navigator of the Navy; and deputy assistant chief of naval operations for information dominance. He also served as senior military assistant for the director, Office of Net Assessment in the Office of the Secretary of Defense. While serving in the Pentagon, Dr. Titley initiated and led the U.S. Navy’s Task Force on Climate Change. After retiring from the Navy, Dr. Titley served as the deputy undersecretary of commerce for operations, the chief operating officer position at the National Oceanic and Atmospheric Administration. Dr. Titley serves on numerous advisory boards and National Academies of Science committees, including the CNA Military Advisory Board and the Science and Security Board of the Bulletin of the Atomic Scientists. Dr. Titley is a fellow of the American Meteorological Society and was awarded an honorary doctorate from the University of Alaska, Fairbanks.