Ukraine’s incursion into Russia’s Kursk Oblast has rattled Russia’s elite but Russian President Vladimir Putin still has a tight grip on the country, said CIA Director William Burns at the Financial Times’ Weekend festival in London on Sept. 7. Speaking alongside MI6 Head Richard Moore, Burns said that the incursion, launched on Aug. 6, was “a significant tactical achievement,” boosting morale in Ukraine as well as unveiling Russia’s weakness. Notably, it has raised difficult questions for Russia’s rich and powerful about “where this is all headed,” he said. However, both Burns and Moore agree…