College students dressed as cheerleaders entertain stranded passengers at Dalian Zhoushuizi International Airport during heavy fog on April 24, 2012. The fog, which loomed around Dalian since Monday night, stranded about 5,000 passengers as of Tuesday afternoon. The airport initiated the performance believing it would help to calm passengers waiting for delayed flights. [Photo/CFP]

College students dressed as cheerleaders entertain stranded passengers at Dalian Zhoushuizi International Airport during heavy fog on April 24, 2012. [Photo/CFP]