Aerospace Global News published a retrospective on 11 September marking 25 years since the 9/11 attacks. The article notes that reinforced cockpit doors, explosives screening of checked baggage, and extensive pre‑airport passenger checks all originated from the post‑attack security overhaul.
The US Aviation and Transportation Security Act became law on 19 November 2001, creating the Transportation Security Administration (TSA) and federalising passenger screening. By December 2002 the TSA had deployed explosives detection systems nationwide, achieving 100% hold‑bag screening.
Full‑body scanners began appearing at US airports in 2010 to detect non‑metallic threats. The report also highlights that newly built US airliners will receive a second physical barrier protecting the flight deck, showing that security measures continue to evolve.
