The checkpoint featured closed-circuit television that recorded all passengers, including the hijackers, as they were screened.
( ( The checkpoint ) ( ( featured ( ( closed-circuit television ) ( that ( ( ( recorded ( all passengers ) ) , ) ( including ( ( ( the hijackers ) , ) ( as ( they ( were screened ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN checkpoint)) (VP (VBD featured) (NP (NP (JJ closed-circuit) (NN television)) (SBAR (WHNP (WDT that)) (S (VP (VBD recorded) (NP (DT all) (NNS passengers)) (, ,) (PP (VBG including) (NP (NP (DT the) (NNS hijackers)) (, ,) (SBAR (IN as) (S (NP (PRP they)) (VP (VBD were) (ADJP (JJ screened)))))))))))) (. .)))
There was no recording device anywhere in the airport, so they had no footage of the hijackers.
( ( ( ( ( There ( was ( ( no ( recording device ) ) ( anywhere ( in ( the airport ) ) ) ) ) ) , ) so ) ( they ( had ( ( no footage ) ( of ( the hijackers ) ) ) ) ) ) . )
(ROOT (S (S (NP (EX There)) (VP (VBD was) (NP (NP (DT no) (VBG recording) (NN device)) (ADVP (RB anywhere) (PP (IN in) (NP (DT the) (NN airport))))))) (, ,) (IN so) (S (NP (PRP they)) (VP (VBD had) (NP (NP (DT no) (NN footage)) (PP (IN of) (NP (DT the) (NNS hijackers)))))) (. .)))