Open this photo in gallery: Honour guard soldiers march during a rehearsal for the Victory Day military parade, which will take place at Dvortsovaya Square on May 9 to celebrate 80 years after the victory in World War II, in St. Petersburg, on April 22.Dmitri Lovetsky/The Associated Press Russian President Vladimir Putin declared Monday that his forces in Ukraine will observe a three-day ceasefire early next month, even as the Kremlin repeated maximalist demands that make a longer-term peace deal unlikely. The May 8 to 10 ceasefire, if it happens, will coincide with the 80th anniversary of the Allied victory...