Report Space Security Space Threat Assessment 2018 PublishedApril 11, 2018 By Todd Harrison, Kaitlyn Johnson, Thomas G. Roberts Download PDF The digital version of Space Threat Assessment 2018 includes interactive data, recommended reading, and featured photos. Click here to read the first chapter. The United States Depends on space across the full spectrum of military operations. These space systems, both U.S. government satellites and those of commercial and international partners, are vulnerable to a wide array of threats, ranging from jamming and cyberattacks to direct-ascent anti-satellite (ASAT) weapons. While the need to improve the resiliency of space systems to different forms of attack is often discussed publicly, the progress other nations are making in developing and deploying counterspace weapons is not. Space Threat Assessment 2018 reviews and aggregates open-source information on the counterspace capabilities and activities of other nations, focusing in particular on China, Russia, Iran, and North Korea. The report also assesses the space and counterspace activities of select other nations and some non-state actors. LISTEN "Podcast: A Behind the Scenes Look at Space Threats" This report is not a comprehensive assessment of all known threats to U.S. space systems because many capabilities and activities are not publicly known. Instead, it provides an unclassified assessment that aggregates and highlights publicly available information and makes it accessible for policymakers and the general public.