CAPE CORAL -- Gregg Klowden and Zach Reffner wage war against lizards. BIG ones. In the battle to rid Southwest Florida of the 7-foot invader known as the Nile monitor, speed is essential. "The lizards can climb a tree like a shot out of hell, swim like a fish and outrun a man," said Klowden, a University of Florida-trained biologist. "They do everything but fly." These über lizards, first spotted in Cape Coral in 1990, have taken to the Florida sun so well that they're thriving. Because the rapacious reptiles are such skilled hunters, biologists worry they will devastate endangered...