Which is not one of the three major security operations that have been instituted at airports to guard against explosives, weapons, or other contraband being introduced onto airliners?

Question

Quizplus · Accepted Answer

Racial profiling is not a legitimate and ethical security operation at airports. Access control, profiling (without discrimination based on race or ethnicity), and explosive detection are the three major security operations employed at airports to ensure safety and prevent smuggling of dangerous materials onto planes.

Which Is Not One of the Three Major Security Operations