What is the Wagner group, and who is Yevgeny Prigozhin? For years, it was shrouded in secrecy, then infamy, and after 48 hours of confusion and claims of a "rebellion" in Russia, questions about the notorious Wagner Group and the intentions of its leader Yevgeny Prigozhin were still swirling Monday. The group has been a key piece of Russia's strategy in Ukraine, with Wagner forces being used to hold cities like Bakhmut. Prigozhin had sharply criticized Russian military leaders for weeks, calling the top brass incompetent, even traitorous. Tension between Russia's defense ministry and Wagner escalated dramatically Friday when Prigozhin...