By 9:08, the mission crew commander at NEADS learned of the second explosion at the World Trade Center and decided against holding the fighters in military airspace away from 
( ( By 9:08 ) ( , ( ( ( the ( mission ( crew commander ) ) ) ( at NEADS ) ) ( ( ( ( learned ( of ( the ( second explosion ) ) ) ) ( at ( the ( World ( Trade Center ) ) ) ) ) and ) ( decided ( against ( ( ( holding ( ( the fighters ) ( in ( military airspace ) ) ) ) away ) from ) ) ) ) ) ) )
(ROOT (S (PP (IN By) (NP (CD 9:08))) (, ,) (NP (NP (DT the) (NN mission) (NN crew) (NN commander)) (PP (IN at) (NP (NNP NEADS)))) (VP (VP (VBD learned) (PP (IN of) (NP (DT the) (JJ second) (NN explosion))) (PP (IN at) (NP (DT the) (NNP World) (NNP Trade) (NNP Center)))) (CC and) (VP (VBD decided) (PP (IN against) (S (VP (VBG holding) (NP (NP (DT the) (NNS fighters)) (PP (IN in) (NP (JJ military) (NN airspace)))) (PRT (RP away)) (PP (IN from)))))))))
The crew chief saw the explosion on television.
( ( The ( crew chief ) ) ( ( ( saw ( the explosion ) ) ( on television ) ) . ) )
(ROOT (S (NP (DT The) (NN crew) (NN chief)) (VP (VBD saw) (NP (DT the) (NN explosion)) (PP (IN on) (NP (NN television)))) (. .)))