Website of the U.S. Transportation Security Administration that provides details about what can and cannot be taken on an airplane. The site also has information for travelers with disabilities and medical conditions, those who need to transport special items (e.g., alcoholic beverages, firearms & ammunition, lighters & matches, medications, sporting equipment, etc.), and traveling with children. There is also security information about traveling by passenger rail, sea, car, and mass transit.

Information about airline security from the US Transportation Security Administration.