President Obama is lifted off the ground by Scott Van Duzer, owner of Big Apple Pizza and Pasta Italian Restaurant, during an unannounced stop Sunday in Fort Pierce, Fla. Pablo Martinez Monsivais/AP hide caption

itoggle caption Pablo Martinez Monsivais/AP

Katherine Leon says she spends up to 12 hours a day online interacting with others who share her rare heart condition. Emily Bogle/NPR hide caption

itoggle caption Emily Bogle/NPR

Employers have been asking for prospective employees' Facebook username and passwords to do some extra research on whom they may be hiring. Leon Neal/AFP/Getty Images hide caption

itoggle caption Leon Neal/AFP/Getty Images