Abstract: A mask or respirator that fits over a user's mouth and nose, comprising a material that covers the user's nose and mouth, and a means to incorporate wired microphones, wireless microphones, and other devices.

Abstract: An anti-hijacking apparatus for aircraft and airports including combinations of the following elements: panic/silent alarms hidden on the aircraft, brake locks on the aircraft which can be controlled remotely, tire deflating devices which can be controlled remotely, a fuel line shut-off valve which can be controlled remotely, a fortified cockpit door, bullet proof backs to cockpit seats, a flight system remote control which protects high rise buildings from aircraft collisions, smoke generators, gas dispensers, and other methods of obscuring vision in the passenger cabin, and stun devices and tranquilizer darts.

Abstract: An anti-hijacking apparatus for aircraft and airports including combinations of the following elements: panic/silent alarms hidden on the aircraft, brake locks on the aircraft which can be controlled remotely, tire deflating devices which can be controlled remotely, a fuel line shut-off valve which can be controlled remotely, a fortified cockpit door, bullet proof backs to cockpit seats, a flight system remote control which protects high rise buildings from aircraft collisions, smoke generators, gas dispensers, and other methods of obscuring vision in the passenger cabin, and stun devices and tranquilizer darts.