One of Russia's top crime lords was gunned down Wednesday in Moscow in what police described as a war between two powerful mobs over lucrative construction projects, allegedly including ones for the 2014 Winter Olympics in Sochi. Police said an unidentified gunman fired seven shots from a sniper gun at Aslan Usoyan near a restaurant in central Moscow — the third assassination attempt on him since the late 1990s. Usoyan, also known as Grandpa Khasan, was a 75-year-old ethnic Kurd born in the former Soviet republic of Georgia. Police say for the past two decades he headed one of the...