NORAD would receive tracking information for the hijacked aircraft either from joint use radar or from the relevant FAA air traffic control facility.
( NORAD ( ( would ( ( receive ( ( tracking information ) ( for ( the ( hijacked aircraft ) ) ) ) ) ( either ( ( ( from ( joint ( use radar ) ) ) or ) ( from ( the ( relevant ( FAA ( air ( traffic ( control facility ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP NORAD)) (VP (MD would) (VP (VB receive) (NP (NP (NN tracking) (NN information)) (PP (IN for) (NP (DT the) (JJ hijacked) (NN aircraft)))) (PP (CC either) (PP (IN from) (NP (JJ joint) (NN use) (NN radar))) (CC or) (PP (IN from) (NP (DT the) (JJ relevant) (NNP FAA) (NN air) (NN traffic) (NN control) (NN facility)))))) (. .)))
NORAD gets no tracking information for planes.
( NORAD ( ( gets ( ( no ( tracking information ) ) ( for planes ) ) ) . ) )
(ROOT (S (NP (NNP NORAD)) (VP (VBZ gets) (NP (NP (DT no) (NN tracking) (NN information)) (PP (IN for) (NP (NNS planes))))) (. .)))