Following the 9/11 attacks, aviation security measures increased in which area?

• A. Increased Air Marshals
• B. Decreased screening
• C. Reduced security personnel
• D. Fewer background checks

Answer: (A)

After 9/11, aviation security shifted toward stronger deterrence and rapid response, which included deploying more air marshals on commercial flights to deter hijackings and intervene if needed. This directly represents an increased security measure, so increasing air marshals is the best answer. The other options describe reductions or no change in security, which did not occur in the post-9/11 environment; screening and security personnel generally increased, and background checks for staff were tightened.