The head of Britain’s secret intelligence unit MI6 said Russia is struggling to maintain its military campaign in Ukraine, and that President Vladimir Putin will soon be forced to temporarily halt his invasion, potentially giving Ukraine the opportunity to hit back. Richard Moore, in a rare public appearance at the Aspen Security Forum, said Russia has experienced “epic fails” in achieving its initial goal of removing Ukrainian President Zelensky from his post, capturing Kyiv, and sowing disunity in the West. The intelligence service views Russia’s military gains to be “tiny” and noted the country was “about to run out of...