Russian President Vladimir Putin ordered his troops to hold a large-scale exercise of the Kremlin’s nuclear forces on Tuesday, including practice missile launches, as tensions boil over the Ukraine war. Putin oversaw the drills in a video call with military leaders, as Russian soldiers simulated a nuclear attack using ballistic and cruise missiles. “Taking into account growing geopolitical tensions and emerging new threats and risks, it’s important for us to have modern strategic forces that are always ready for combat,” the Russian president said. Despite the show of force, Putin claimed his nation’s nuclear arsenal would only be deployed under...