The authoritative guide to ensuring science and technology make life on Earth better, not worse.

Watch the 2025 Doomsday Clock announcement on January 28


Kaitlyn Johnson

Kaitlyn Johnson is deputy director and fellow of the Aerospace Security Project at the Center for Strategic and International Studies. Her research specializes in topics such as space security, military space systems, and commercial and civil space policy. Ms. Johnson has written on national security space reorganization, threats against space assets, the commercialization of space, escalation and deterrence dynamics, and defense acquisition trends.