Sign up for free career guidance with 80,000 hours: https://www.80000hours.org/realengineering Watch this video ad free on Nebula: https://nebula.tv/videos/realengineering-why-airport-security-suddenly-got-better Links to everything I do: https://beacons.ai/brianmcmanus Get your Real Engineering shirts at: https://standard.tv/collections/real-engineering Credits: Producer/Writer/Narrator: Brian McManus Head of Production: Mike Ridolfi Editor: Dylan Hennessy Writer/Research: Josi Gold Animator: Eli Prenten Animator: Stijn Orlans Sound and Production Coordinator: Graham Haerther Sound: Donovan Bullen Thumbnail: Simon Buckmaster Head of Moral: Shia LeWoof Special Thanks to Smiths Detection Select imagery/video supplied by Getty Images Thank you to AP Archive for access to their archival footage. Music by Epidemic Sound: http://epidemicsound.com/creator Thank you to my patreon supporters: Abdullah Alotaibi, Adam Flohr, Henning Basma, Hank Green, William Leu, Tristan Edwards, Ian Dundore, John & Becki Johnston. Nevin Spoljaric, Jason Clark, Thomas Barth, Johnny MacDonald, Stephen Foland, Alfred Holzheu, Abdulrahman Abdulaziz Binghaith, Brent Higgins, Dexter Appleberry, Alex Pavek, Marko Hirsch, Mikkel Johansen, Hibiyi Mori. Viktor Józsa, Ron Hochsprung