Issues regarding the use of security scanners arose because of a serious incident that took place on flight NW 253 from Amsterdam to Detroit on 25 December 2009, when a terrorist attempted to use explosives concealed on his body which were not detected by metal detectors.
Turvaskannerite kasutamisega seotud küsimused ilmnesid tõsise vahejuhtumi tõttu, kui 25. detsembril 2009 Amsterdamist Detroiti teel olnud lennul NW 253 püüdis terrorist süüdata enda külge peidetud lõhkeainet, mida metallidetektorid ei olnud avastanud.