Airports of Thailand has dropped newly imposed security measures for all flights at Don Mueang airport after carry-on luggage screenings caused hours-long delays. Three days after requiring all departing passengers to run both carry-on and checked bags through x-ray machines prior to checking in, AoT suspended the plan for domestic and international travellers at 3.30pm to ease long queues stemming from an insufficient number of scanners.Travellers again will have only checked bags x-rayed before entering the check-in area and carry-ons will be scanned before passengers arrive at their gates, as usual.