"Police officers wearing face masks to protect against coronavirus guard an entrance of the prison colony IK-2, which stands out among Russian penitentiary facilities for its particularly strict regime, with the sign reads ""Security zone"", in Pokrov in the Vladimir region, 85 kilometers (53 miles) east of Moscow, Russia, Tuesday, April 6, 2021. Doctors from the Navalny-backed Alliance of Doctors announced going to the Pokrov prison on Tuesday to demand the opposition leader gets qualified medical help from independent doctors after he complained about pain in his leg and back. (AP Photo/Denis Kaminev)"
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