MOSCOW Russian President Vladimir Putin's order for a three-day truce with Ukraine took effect Thursday, a move the Kremlin said would "test" Kiev's readiness for peace but that Ukraine has slammed as a farce. It was not immediately clear whether either side was observing the ceasefire, even with world leaders — including China's Xi Jinping, Brazil's Luiz Inacio Lula da Silva and Serbia's Aleksandar Vucic — in Moscow for commemorations of the end of World War II. Putin unilaterally ordered the