The sidelining of the Abrams reflects evolving battlefield tactics where drone use has made it virtually impossible for them to maneuver without detection.
Gen. Sergei Surovikin, the deputy commander of the Russian group of forces fighting in Ukraine, is believed to have been detained, sources told the AP.
Wagner head Yevgeny Prigozhin released the first audio statement since an aborted armed rebellion, calling it justified by the killing of some 30 fighters.
Putin is vowing to punish the organizers of an armed rebellion after mercenary chief Yevgeny Prigozhin led his troops out of Ukraine seized a key city.
U.S. Air Force Capt. David Brown, who's an F-16 pilot, said at the Paris Air Show this week that training takes about a year for American military pilots.