What is the V1-VR terrorist runway kill zone (RKZ)? The RKZ is a zone on an airport takeoff runway between two points called V1 and VR that every large multi-engine jet aircraft, such as Air Force One, must pass through while taking off. Here is a cockpit video of a 747-400 where the co-pilot can be heard to call out “V1″ at 1:24 and then call out “rotate” (VR) at 1:30, as required for all takeoffs. The runway zone travelled by the aircraft in the 6 seconds between V1 and VR for this takeoff is the RKZ. If any two...