Do you know that Boeing 727s have an integrated rear staircase? It could be deployed in-flight, and was publicly demonstrated on at least one occasion, by one mysterious airjacker Dan Cooper. There were also rumors that CIA used these aircrafts to insert personnel during the Vietnam War, while maintaining a relatively unmodified civilian configuration. Boeing added a device to prevent the staircase from being deployed mid-air after the Cooper incident.

Do you know that Boeing 727s has an integrated rear staircase? It could be deployed in-flight, and was publicly demonstrated on at least one occasion, by one mysterious airjacker Dan Cooper. There were also rumors that CIA used these aircrafts to insert personnel during the Vietnam War, while maintaining a relatively unmodified civilian configuration. Boeing added a device to prevent the staircase from being deployed mid-air after the Cooper incident.