Seattle Times: Park rangers discovered 20 "tar balls" on a Key West shore, prompting alarm Tuesday that the first sign of the massive BP oil spill had washed up on a Florida shore. In Key West, the Coast Guard urged calm and sent samples of the three- to eight-inch flattened tar balls to a lab in Groton, Conn., to determine whether they had come from the massive leak in the Gulf of Mexico or perhaps oil remnants from a passing ship. "The local people here are very sensitive to environmental issues so, of course, anything like this is going to cause concern," said Anna K. Dixon, a Coast Guard Navy lieutenant, junior grade, from Key West.