Thus, while the fighter pilots under NORAD direction who had scrambled out of Langley never received any type of engagement order, the Andrews pilots were operating weapons free-a permissive rule of engagement.
( Thus ( , ( ( while ( ( ( the ( fighter pilots ) ) ( under ( ( NORAD direction ) ( who ( had ( ( ( scrambled out ) ( of Langley ) ) never ) ) ) ) ) ) ( received ( ( any type ) ( of ( engagement order ) ) ) ) ) ) ( , ( ( the ( Andrews pilots ) ) ( ( were ( operating ( weapons ( ( free-a ( permissive rule ) ) ( of engagement ) ) ) ) ) . ) ) ) ) ) )
(ROOT (S (ADVP (RB Thus)) (, ,) (SBAR (IN while) (S (NP (NP (DT the) (NN fighter) (NNS pilots)) (PP (IN under) (NP (NP (JJ NORAD) (NN direction)) (SBAR (WHNP (WP who)) (S (VP (VBD had) (VP (VBD scrambled) (PRT (RP out)) (PP (IN of) (NP (NNP Langley))) (ADVP (RB never))))))))) (VP (VBD received) (NP (NP (DT any) (NN type)) (PP (IN of) (NP (JJ engagement) (NN order))))))) (, ,) (NP (DT the) (NNP Andrews) (NNS pilots)) (VP (VBD were) (VP (VBG operating) (S (NP (NNS weapons)) (NP (NP (JJ free-a) (JJ permissive) (NN rule)) (PP (IN of) (NP (NN engagement))))))) (. .)))
Fighter pilots were scrambled out of Langley and were given engagement orders immediately.
( ( Fighter pilots ) ( ( ( ( were ( ( scrambled out ) ( of Langley ) ) ) and ) ( were ( ( given ( engagement orders ) ) immediately ) ) ) . ) )
(ROOT (S (NP (NNP Fighter) (NNS pilots)) (VP (VP (VBD were) (VP (VBN scrambled) (PRT (RP out)) (PP (IN of) (NP (NNP Langley))))) (CC and) (VP (VBD were) (VP (VBN given) (NP (JJ engagement) (NNS orders)) (ADVP (RB immediately))))) (. .)))