Tens of thousands are marching in Seoul against Lee Myung-bak’s 107-day old government. More than 20,000 police officers are trying to control the crowd.

For the past 40 days, central Seoul has been rocked by demonstrations, which began as rallies by hundreds of teenage students, singing, dancing and holding candles to protest the importing of American beef. They have now evolved into a protest against government policies on education, health care and consumer prices.