European Commission President Ursula von der Leyen vowed retribution as she visited Bucha on Friday, as the world recoils from recent reports that Russian troops committed atrocities there as they retreated. The German politician was the first Western leader to travel to the Kiev suburb, where she viewed 20 bodies exhumed from a mass grave there and lit candles in a church for the victims. “Now the whole world can see the true face of Russia,” a uniformed man said as he showed von der Leyen around the site where the bodies lay in black bags. “We knew about it for years. But now the whole world…