Even if he did land safely, agents contended, survival in the mountainous terrain would have been all but impossible without an accomplice at a predetermined landing point, which would have required a precisely timed jump--necessitating, in turn, cooperation from the flight crew.
Even if he did land safely, agents contended, survival in the mountainous terrain would have been all but impossible without an accomplice at a predetermined landing point--necessitating from the flight crew. This was in turn. Turn is cooperation. A predetermined landing point would have required a precisely timed jump.