MAINZ, Germany (Reuters) - About 12,000 protesters, many carrying banners reading "Bush go home," "No. 1 Terrorist" and "Warmonger," marched through the German city of Mainz on Wednesday, but were mostly kept away from the visiting U.S. president. The official rally, which was twice as big as expected, never got within earshot of President Bush, but a small group of protestors rushed toward his car as he left to visit a U.S. base in nearby Wiesbaden. Police wrestled several demonstrators to the ground and led them away in handcuffs, a Reuters witness said. Bush was visiting Germany for the first...