Russian President Vladimir Putin on Saturday oversaw a military parade commemorating the defeat of Nazi Germany in World War II. Security was tight in Moscow as Putin was set to speak at the parade in the Red Square, even as a U.S.-brokered three-day ceasefire eased concerns about possible Ukrainian attempts to disrupt the festivities. Putin, in power for more than a quarter-century, has used Victory Day, Russia’s most important secular holiday, to showcase the country’s military might. But this year, for the first time in nearly two decades, the parade will take place without tanks, missiles and other heavy weapons, aside from a traditional flyover of combat jets. Officials said the sudden change of format was due to the “current operational situation”. Kremlin spokesman Dmitry Peskov said the authorities have taken “additional security measures.”