Zachary Kallenborn is a freelance researcher and analyst, specializing in chemical, biological, radiological, and nuclear (CBRN) weapons, CBRN terrorism, drone swarms, and emerging technologies. His research has appeared in The Nonproliferation Review, Studies in Conflict and Terrorism, Defense One, The Modern War Institute at West Point, and other outlets.

Articles by Zachary Kallenborn

The USS Chicago at periscope depth.

If the Oceans Become Transparent

By Zachary Kallenborn
October 2019
Sensors are becoming ever better and more widespread. Submarines will need new operating concepts to preserve their utility and maintain a viable second-strike capability.