Volunteers pose with paper folds shaped like a pair of blue lips to raise public awareness on pulmonary edema, a disease characterized by blue lips, at People's Park in Liaocheng, Shandong province, Oct 16, 2013. Pulmonary edema is a condition in which the lungs fill with fluid. When this occurs, the body struggles to get enough oxygen, often resulting in breathlessness, coughing, excessive sweating, and bluish skin or lips. [Photo by Zhao Yuguo/Asianewsphoto]