Which organization is responsible for aviation safety regulations in the United States?

The Federal Aviation Administration (FAA) is the organization tasked with establishing and enforcing aviation safety regulations in the United States. This agency's responsibilities include overseeing and regulating all aspects of civil aviation, which encompasses flight operations, air traffic control, and the certification of aviation personnel and equipment. The FAA's primary mission is to ensure the safety of the aviation system, which involves setting safety standards and conducting inspections to make sure that airlines and pilots adhere to these regulations.

The other organizations mentioned play significant roles in aviation and transportation but focus on different areas. For instance, the National Transportation Safety Board (NTSB) investigates aviation accidents and makes recommendations for improving safety but does not set regulations. The Department of Transportation (DOT) oversees a broad array of transportation modes and policies, while the Transportation Security Administration (TSA) is responsible for security measures and screening processes in airports but does not regulate aviation safety per se. Each of these organizations contributes to the overarching framework of transportation safety, but the FAA specifically focuses on aviation safety regulations.