Prigozhin at a foreign investors meeting in St. Petersburg in 2016.Mikhail Svetlov/Getty Images Wagner boss Yevgeny Prigozhin ripped in Russia's military leaders over drone attacks in Moscow. "Why the f--k are you allowing these drones to fly to Moscow?" Prigozhin said. Meanwhile, the Kremlin downplayed the attacks and said Russia's air defenses worked well. Yevgeny Prigozhin, head of the notorious Wagner mercenary group, excoriated Russia's military leaders after a rare drone attack in Moscow on Tuesday, which brought the war in Ukraine home for Russian civilians in a new way.