President Vladimir Putin vowed Saturday to defend Russia against an armed rebellion by mercenary chief Yevgeny Prigozhin, who led his troops out of Ukraine and into a key city south of Moscow. The uprising, which Putin called “a stab in the back,” was the biggest threat to his leadership in over two decades in power. The private army led by Prigozhin appears to control the military headquarters in Rostov-on-Don, a city 660 miles (over 1,000 kilometers) south of Moscow that runs Russian offensive operations in Ukraine, Britain’s Ministry of Defense said in an intelligence briefing. As the fast-moving events unfolded ... (full story)