Sen. Ben Nelson, D-Neb., has introduced legislation that would eliminate preferred security lines for elite and first-class travelers. "This bill is about fairness," Nelson said. "Regardless of whether or not you have a first-class ticket or have reached a certain frequent-flier status, the purpose of the airport security screening line is to ensure traveler safety. Allowing a select few to cut in front of those who are waiting patiently, just in order to provide a perk, has nothing to do with safety." The legislation would not end the Pre-Check program. Critics of the bill say it would penalize the airlines' best customers.