Next airing Wed May 2, 10 a.m. ET

Shark Attack Beach

A recent string of shark attacks at New Smyrna Beach in Florida has left beachgoers fearing for their lives. Join local scientists in the search for clues to what's causing the attacks. And in Wyoming, death comes in overwhelming numbers as hundreds of elk become suddenly sick, leaving wildlife officials with the tough choice to put them down in order to end their suffering. Rangers and veterinarians search for a cause to this urgent and heartbreaking problem.