THOUSANDS OF UKRAINIAN TROOPS IN RUSSIA.

LINSEY DAVIS (ABC NEWS) (Off-camera) Tonight, for the first time, Ukrainian President Volodymyr Zelenskyy is acknowledging that his country's forces are conducting an operation inside Russia. These images circulating online show the moment a Ukrainian missile struck a building in western Russia. The Kremlin says dozens of Russians have been wounded in the past several days, some of them children. ABC's Patrick Reevell has the latest. [ABSTRACT FROM PUBLISHER]