U.S. cyclists wear masks upon arrival in Beijing

Some American cyclists were wearing black masks when they arrived today at the airport in Beijing.

"I suspect it was their choice, you would have to talk to them as to what prompted them to do this," Darryl Seibel, a spokesman for the U.S. Olympic Committee tells Reuters. "I will say this: I am not a scientist, but in my view that was unnecessary."

The level of pollutants in the air was particularly bad yesterday. Right now, Beijing is "shrouded in a light gray haze," according to the Associated Press.

U.S. cyclists wear masks upon arrival in Beijing....