from the Seattle Times, 5-28-2021 page A2

Treaty Spurned The Biden administration has informed Russia
that the United States will not rejoin the Open Skies Treaty,
which allowed the nations to conduct surveillance of each other,
even though President Joe Biden harshly criticized his predecessor
during last years campaign for pulling out of the agreement,
State Department officials said Thursday. President Donald
Trump withdrew from the treaty last year, citing numerous
violations by the Russians. As president, Biden ordered a
new review of the treaty, and officials said they have
concluded the Russians continue to violate the pact and
there is no chance of salvaging it.

supported (poorly) by:
https://www.nbcnews.com/politics/national-security/u-s-tells-russia-it-won-t-rejoin-open-skies-n1268840

U.S. tells Russia it won't rejoin arms control pact that was
'undermined by Russian violations'
Trump announced the U.S. exit from the treaty in 2020, but U.S.
and Russian officials had held out the possibility that the
two sides could rejoin.