FORT LAUDERDALE, Fla. -- An attempt to save Florida coral is wrecking the reef instead. Apparently, they didn't think through what seawater does to metal.The divers are off before dawn.Diver Thomas Pennypacker is on a rescue mission off the coast of Ft. Lauderdale, saving a piece of Florida's natural coral reef. A massive 35-acre graveyard of old tires.It...