CNN learned about the "window of four weeks" to prevent an attack on Ukraine

US President Joe Biden instructed his administration to do everything to prevent a possible Russian invasion of Ukraine and gave a "window of four weeks" to this, CNN reports, citing a senior official.

According to him, Biden is afraid of repeating the mistakes of 2014, when the United States and the European Union were “caught by surprise” due to the annexation of Crimea. So he instructed national security aides to "use every possible tool to try and contain Russian President Vladimir Putin," the TV channel reported.

"What we're doing is very thoughtful," the source told CNN.

According to CNN, the United States began to respond to reports of Russia's planned aggression against Ukraine in the fall. In particular, the HEAD of the CIA, William Burns, came to Moscow in November to "directly warn Putin" against such actions, the report says. However, as Russia continued to build up troops on the border with Ukraine , according to the US, Washington decided to move from “quiet diplomacy” to public threats of sanctions.