Chinese migrant workers, along with their belongings packed in makeshift bags, wait outside a massive construction site for a bus to take them to another building site in downtown Beijing March 30, 2009. The threat of social instability is one of the biggest worries stalking the the country's economy in this year of political anniversaries. Last month approximately 20 million migrant workers lost their jobs since the financial crisis began last year. (UPI Photo/Stephen Shaver)