Vintage photos show what airport security was like before 9/11

Airport security in the 1970s. Duane Howell/Denver Post via Getty Images Airport security used to be far more relaxed with fewer screenings and restrictions. People didn't need plane tickets to get through security, and knives were allowed on flights. The Transportation Security Administration wasn't established until after 9/11. Before 9/11, airport security was far more relaxed than it is today. Friends and family could accompany travelers through security without a boarding pass. Knives and blades were allowed in carry-on bags as long as they were smaller than 4 inches. Private companies, not the government-run Transportation Security Administration, handled screenings. Airport security did evolve over the decades in response to bombings — like the Pan Am bombing over Lockerbie, Scotland, in 1988 — as well as hijackings and other threats. X-ray machines and metal detectors slowly became familiar features, but the experience was vastly different compared to modern air travel. In the aftermath of September 11, airport security transformed almost overnight. These vintage photos show how travelers once navigated a system that now seems unrecognizable. Before 9/11, checked luggage was not subject to universal explosives screening. The conveyor belt took baggage to the bus docks at New York's East Side Airlines Terminal. Orlando /Three Lions/Getty Images X-ray baggage screenings weren't introduced until the 1950s. Early airport security X-ray. One of the first X- rays ever taken of the interior of a suitcase, using X-ray surveillance at an airport. Two hand guns have been exposed, with a grenade tucked into the shoe at lower left. This late 1950s image was taken at an airport in the United Kingdom. X-ray fluoroscopy was the process, used by a security device manufactured by Pantak. X-ray checks have since become more sophisticated, but are still only as efficient as the guards analysing these X- rays. In this case the grenade could easily be mistaken for a sock in the shoe, and a gun seen from end on is much harder to recognise.No use: BBC, Pearson, Oxford University Press, Springer Nature, Dorling Kindersley, Cambridge University Press & Assessment, New Scientist, Bonnier Publications, John Wiley & Sons, The Lancet, BMJ Science Photo Library via Reuters Connect Signs warned passengers from bringing weapons and explosives, but screenings were lax by today's standards. Airport officials view are introduced to new signage warning passengers of penalties for making false statements regarding hijacking or carrying weapons aboard an aircraft, 1970. Federal Aviation Administration/PhotoQuest/Getty Images More stringent security checks at John F. Kennedy Airport in 1970 caught weapons such as guns, daggers, and hand grenades. Jan. 1, 1970 - When President Nixon called for the death penalty for sky jackers, this pictured may have helped to influence him. It was taken in the Marshall's office in Brooklyn, New York and represents the results of one week's frisking of passengers passing through Kennedy Airport. Automatics, daggers, ammunition, even a hand greanade all were discovered by the stringent security checks at Kennedy in a seven day period. All the guns were later tested by ballistic experts to find if they had been used in recent times. Then the haul was destroyed. Keystone Press Agency/ZUMA Press Wire In 1973, the FAA mandated the use of magnetometers and X-ray machines to screen passengers and carry-ons on commercial flights. DEC 20 1972; A guard watches as passengers and visitors file through one of the "magnetometer" tunnels at Stapleton International Airport. System, begun Tuesday, is to prevent hijackings. The Denver Post via Getty Images Full-body scanners wouldn't arrive until 2007. 2/21/1987, DEC 22 1987; Stapleton Airport "Security" United Airline Pilots going thru security early Monday morning. John Prieto/Denver Post via Getty Images Many airports had kiosks with life insurance vending machines geared toward nervous flyers. Passengers could buy travel insurance at the airport. Don Cravens/Getty Images Before 9/11, people who weren't flying could obtain gate passes and access the gate area. An airport security officer checking carry-on luggage in 1980. Jacques M. Chenet/CORBIS/Corbis via Getty Images There were also no restrictions on bringing liquids or gels in carry-on bags back then. JUL 15 1973, JUL 16 1973, JUL 17 1973; Passengers on "B" concourse at Stapleton International Airport Pvt hand luggage through new machine installed by Unites Airlines.; (Photo By John Beard/Denver Post via Getty Images The first security lines at San Francisco International Airport formed in 1973, with an express line for passengers with no carry-ons. Feb. 20, 1973: The first security lines at San Francisco International Airport, where passengers were searched after years of minimal security at the airport. Clem Albers/San Francisco Chronicle via Getty Images Separate lines for TSA Pr