With the opening ceremony just days away, can Beijing clean up its air in time for healthy Olympic competition? We sit down with George Thurston--a professor of environmental medicine at NYU, a leading expert on airborne pollutants and a former athlete himself--to find out why every athlete may be in danger from the physiological effects of smog, and why neither USOC-supplied masks nor China's emergency plans can stop them. Plus, Paul Strauss explains how independent tests could finally rid pro cycling of banned substances, and the low-tech scorekeeper for the Boston Red Sox takes us behind the Green Monster at baseball's trading deadline.