Empty turtle shells, decaying skunk carcasses and a set of deer antlers lay strewn about an empty campsite in California's Sierra National Forest. The butchered animals, as well as several five-pound propane canisters, camp stoves and heaps of trash, were all that remained of the 69 marijuana plantations recently uncovered in Fresno County as part of operation "Save our Sierras." The massive operation that began in February has already seized about 318,000 marijuana plants worth an estimated $1.1 billion, officials announced last week. In addition to 82 arrests, the multi-jurisdictional federal, state and local operation netted 42 pounds of processed...