welcome back, everybody. take a look at this video. it's amazing aerial footage from off the coast of palm beach, florida. there are literally thousands of sharks there. they're making their yearly migration. the animals have forced a slew of local beaches to close temporarily as the sharks pass through. experts say no need to worry, though. also this week, scientists from the nonprofit o search made history. they tagged the first great white shark on reported off the coast of florida and are now tracking the 14-foot lydia. jeff cor wwin is back with us. nice to have you back, we appreciate it. so the first-ever great white tagged locally off the coast of florida. there's obviously a bigger goal than just the tagging of the shark. they described it as now we can start working on the puzzle. what's the puzzle you're trying to solve? >> well, basically trying to unravel the mysteries of these incredible predatory sharks. these amazing great whites. to find out why they would stray and wander into waters that