We begin with a massive fraud that could make you think twice the next time you or a loved one gets treatment from a nurse. Operation Nightingale is the name given to a federal investigation that exposed a scheme to sell fake nursing degrees, no classes or training required, just a lot of cash. In the end, a handful of greedy fraudsters in South Florida made a quarter of a billion dollars and flooded the U.S. with 15,000 unqualified ‘nurses.’ It began with a tip and an undercover video.