Russian President Vladimir Putin on Tuesday lowered the threshold for nuclear weapons use, just two days after the U.S. authorized Ukraine to use long-range missiles inside of Russia. Putin updated his nuclear doctrine,

President Vladimir Putin has updated Russia’s nuclear doctrine days after President Joe Biden gave Ukraine the approval to use U.S.-provided weapons to hit targets deep into Russian territory. A key component of Russia’s revised nuclear doctrine,

Russia said Ukraine has fired U.S.-made longer-range weapons inside its territory, days after the U.S. said it would allow Kyiv to use those systems to conduct deeper strikes, a long-sought request by Kyiv.