DESCENDANTS of Genghis Khan, the man who conquered half the world in the 13th century, rolled out the red carpet yesterday for the most powerful man of the 21st century. George Bush stood to attention in the biting cold before an honour guard of Mongolian soldiers in blue and red uniforms and with sabres at the ready as the United States national anthem played to welcome the first serving American President to set foot in Ulan Bator. Mr Bush chose to wrap up a four-nation Asian trip in this young democracy, where fewer than three million people, mostly nomads, live...