Tens of thousands of anti-war demonstrators have staged rallies in Washington and London, demanding the withdrawal of US and British troops as the Iraq conflict becomes increasingly unpopular. Chanting "Bring the Troops Home Now," a column of protesters stretched for several blocks around the White House, with parents pushing infants in strollers while students beat makeshift drums. The French news agency "AFP" quoted Washington organizers as saying the crowd exceeded 100,000 protesters and police said the estimate was probably right.Opponents of the US-led war also marched in central London. Police said 10,000 people converged on Hyde Park though organizers said there was 100,000. Small rallies were also held in Copenhagen, Damascus, Helsinki, Paris, Rome and Seoul, while an anti-war march was also held in San Francisco on the US West coast. Others were scheduled in Los Angeles and Seattle.