The Cipher Brief Open Source Report for Friday, March 25, 2022

Topping today’s report: US Nuclear weapons policy under review; US and Europe strike natural gas deal; Ukraine says 300 killed in Mariupol theatre attack; Ukraine’s military takes back territory, and the US indicts Russians on hacking on infrastructure. Let’s get right to the full report today and remember you can always find links to our original sources in the Cipher Brief Daily newsletter. Sign up at thecipherbrief.com.