Which entity is responsible for issuing the O'Hare Airport Badge?

The correct response is that the Chicago Department of Aviation is responsible for issuing the O'Hare Airport Badge. This department oversees the operations, maintenance, and management of the airport, and as part of these responsibilities, it handles the security badge program.

The airport badge is crucial for ensuring that individuals who require access to certain areas of the airport meet the necessary security standards. The Chicago Department of Aviation implements protocols and vetting processes to ensure that all badge applicants comply with federal and local regulations. Their direct oversight ensures that the badge issuance aligns with the airport's overall security framework.

The other entities mentioned, although significant in their roles, do not have the direct responsibility for this specific aspect. For example, the Chicago Police Department focuses on law enforcement within the airport, while the Federal Aviation Administration regulates aviation safety and operations. The Illinois Department of Transportation is involved in broader transportation policies and regulations rather than the specific management of airport badges.