From the Document: "The United States announced [hyperlink] its withdrawal [hyperlink] from the Treaty on Open Skies [hyperlink] on May 22, 2020; this withdrawal took effect [hyperlink] on November 22, 2020. The United States no longer participates in flights or shares data collected by others. Russia also announced [hyperlink] its plans [hyperlink] to withdraw, while beginning the domestic procedures for withdrawal on January 15, 2021. It has indicated that it will soon send its official notification to the other treaty parties. [...] The Biden Administration has not yet decided whether it will seek to rejoin the treaty, but recent reports [hyperlink] indicate the Administration has informed U.S. allies that it is concerned that rejoining the treaty could 'send the wrong message to Russia and undermine our position on the broader arms control agenda' if Russia continues to violate Open Skies. In addition, the Air Force [hyperlink] has removed the U.S. Open Skies aircraft from service and has taken steps to retire them."
CRS Insight, IN10502
Congressional Research Service: https://crsreports.congress.gov/