Russia is using prisoners and freshly mobilized troops to absorb heavy Ukrainian fire along the war's front lines in order to clear the way for its better trained forces to take ground, a US official said, calling the move a classic Russian tactic. Prisoners recruited by the Wagner Group — a notorious paramilitary organization with close ties to the Kremlin — and others have recently been deployed to the forefront of fighting around eastern Ukraine's war-torn city of Bakhmut, which has become the epicenter of hostilities between Moscow and Kyiv. These recruits have been forced to "take the brunt" of...