At 9:58:57, Jarrah told another hijacker in the cockpit to block the door.
( ( At 9:58:57 ) ( , ( Jarrah ( ( ( ( told ( another hijacker ) ) ( in ( the cockpit ) ) ) ( to ( block ( the door ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN At) (NP (CD 9:58:57))) (, ,) (NP (NNP Jarrah)) (VP (VBD told) (NP (DT another) (NN hijacker)) (PP (IN in) (NP (DT the) (NN cockpit))) (S (VP (TO to) (VP (VB block) (NP (DT the) (NN door)))))) (. .)))
The hgjackets seemed to know what they were doing. 
( ( The hgjackets ) ( ( seemed ( to ( know ( what ( they ( were doing ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNS hgjackets)) (VP (VBD seemed) (S (VP (TO to) (VP (VB know) (SBAR (WHNP (WP what)) (S (NP (PRP they)) (VP (VBD were) (VP (VBG doing))))))))) (. .)))