President Barack Obama nominated Vice Adm. Peter Neffenger, the U.S. Coast Guard's second-in-command, to run the Transportation Security Administration.
An Associated Press investigation found 268 instances in which people breached the perimeter of 31 of the nation's busiest airports between January 2004 and January 2015.
More than 1.9 billion mobile boarding passes will be used by 2019, compared to 745 million estimated to be delivered in 2015 alone, Jupiter Research reports.
Airport screening procedures to stop the spread of infectious diseases miss half to three-quarters of infected travelers who make it to their destinations.