In this AP file photo from April 12, 2016, Transportation Security Administration inspectors monitor a security checkpoint at Lambert-St. Louis International Airport in St. Louis.
In this AP file photo from April 12, 2016, Transportation Security Administration inspectors monitor a security checkpoint at Lambert-St. Louis International Airport in St. Louis. Jeff Roberson AP
In this AP file photo from April 12, 2016, Transportation Security Administration inspectors monitor a security checkpoint at Lambert-St. Louis International Airport in St. Louis. Jeff Roberson AP