What security measure did the LaGuardia bombing lead to?

• A. Public lockers were removed from terminals.
• B. Lockers are routinely searched by dogs.
• C. Post-security locker checks became standard.
• D. Public lockers were restricted to the Sterile Area.

Answer: (D)

Main concept: Security responses to high-profile airport attacks focus on limiting access to potential threat surfaces by placing sensitive or storage areas behind security barriers so items can be screened.

After the LaGuardia bombing, authorities tightened access to storage in terminals by restricting public lockers to the sterile area. This means lockers are only available within the security-bypassed zone, accessible after passengers have gone through screening. By doing this, any item placed in a locker would be within a controlled, monitored space and subject to security checks, reducing the chance that a weapon or dangerous item could be stored in a public area and discovered too late.

Other options don’t fit as directly because they describe broader or different security steps (removing all public lockers, routine dog searches of lockers, or post-security locker checks) rather than tying the measure specifically to moving or restricting lockers into the secure zone.