RIO DE JANEIRO -- The Rodrigo de Freitas lagoon, with its glistening waters, is one of this tropical city's most picturesque spots. Just don't look too closely at those waters.
As Rio de Janeiro prepares to host the Summer Olympics in less than a year, concern remains that the site for rowing and canoeing competitions and venues for other aquatic events are polluted and dangerous to athletes.
Last week, four coaches and 11 members of the U.S. team came down with stomach illnesses at the World Junior Rowing Championships after competing in the lagoon. It has not been determined whether the polluted water was to blame, and U.