Does 'As United 93 left Newark, the flight's crew members were unaware of the hijacking of American 11.' stand independently of the premise 'As the flight United 93 left Newark the crew members were fully aware of the hijacking of American 11.', neither following nor contradicting it?
As United 93 left Newark, the flight's crew members were unaware of the hijacking of American 11.###As the flight United 93 left Newark the crew members were fully aware of the hijacking of American 11.