HHS found that 19 percent of nurse aides who'd been disciplined had a prior conviction that would have shown up on a background check. Matt Rourke/AP hide caption

toggle caption Matt Rourke/AP

Dolphin bite? There's a medical code for that. Simone Di Tonno - Annachiara Fig/iStockphoto.com hide caption

toggle caption Simone Di Tonno - Annachiara Fig/iStockphoto.com

People check their smartphones while standing in the street shortly after an earthquake struck Washington on Tuesday. Mandel Ngan/AFP/Getty Images hide caption

toggle caption Mandel Ngan/AFP/Getty Images