How 9/11 changed air travel: more security, less privacy

Travelers wear face coverings in the queue for the south security checkpoint in the main terminal of Denver International Airport Tuesday, Aug. 24, 2021, in Denver. Two months after the Sept. 11, 2001 attacks, President George W. Bush signed legislation creating the Transportation Security Administration, a force of federal airport screeners that replaced the private companies that airlines were hiring to handle security. (AP Photo/David Zalubowski)

Travelers wear face coverings in the line for the south security checkpoint in the main terminal of Denver International Airport Tuesday, Aug. 24, 2021, in Denver. Two months after the Sept. 11, 2001 attacks, President George W. Bush signed legislation creating the Transportation Security Administration, a force of federal airport screeners that replaced the private companies that airlines were hiring to handle security. (AP Photo/David Zalubowski)

A United Express jet taxis down a runway as a Southwest Airlines plane takes off in the background at Denver International Airport, Tuesday, Aug. 24, 2021, in Denver. Two months after the Sept. 11, 2001 attacks, President George W. Bush signed legislation creating the Transportation Security Administration, a force of federal airport screeners that replaced the private companies that airlines were hiring to handle security. (AP Photo/David Zalubowski)

A lone traveler wears a face covering as she stops to check the departure monitors across from the United Airlines ticketing counter in the main terminal of Denver International Airport Tuesday, Aug. 24, 2021, in Denver. Two months after the Sept. 11, 2001 attacks, President George W. Bush signed legislation creating the Transportation Security Administration, a force of federal airport screeners that replaced the private companies that airlines were hiring to handle security. (AP Photo/David Zalubowski)

Travelers wear face coverings in the line for the north security checkpoint in the main terminal of Denver International Airport Tuesday, Aug. 24, 2021, in Denver. Two months after the Sept. 11, 2001 attacks, President George W. Bush signed legislation creating the Transportation Security Administration, a force of federal airport screeners that replaced the private companies that airlines were hiring to handle security. (AP Photo/David Zalubowski)

Travelers wear face coverings in the line for the south north security checkpoint in the main terminal of Denver International Airport Tuesday, Aug. 24, 2021, in Denver. Two months after the Sept. 11, 2001 attacks, President George W. Bush signed legislation creating the Transportation Security Administration, a force of federal airport screeners that replaced the private companies that airlines were hiring to handle security. (AP Photo/David Zalubowski)

DALLAS — Ask anyone old enough to remember travel before Sept. 11, 2001, and you’re likely to get a gauzy recollection of what flying was like.