The U.S. Department of Defense’s top spokesman warned Sunday that Russia could invade Ukraine “at any time” and claimed there are a number of ways to do so at Russian President Vladimir Putin’s disposal. “Putin has a lot of options available to him if he wants to further invade Ukraine, and he can execute some of those options imminently,” Pentagon press secretary John Kirby said in a “Fox News Sunday” interview. Top Defense Department officials share a grim outlook of the immediate future, he added, pointing to Russian troops amassed along the Ukraine-Russia border as well as the number of troops in Belarus, also located next to Ukraine. He also cited Russian ships positioned in the Mediterranean Sea and the Atlantic Ocean. “It doesn’t have to come to conflict. We still believe there’s room and space for diplomacy, and we’d like to see that be the solution here,” Kirby said. …