Repeatedly between 10:14 and 10:19, a lieutenant colonel at the White House relayed to the NMCC that the Vice President had confirmed fighters were cleared to engage inbound aircraft if they could verify that the aircraft was hijacked.
( ( Repeatedly ( between ( ( 10:14 and ) 10:19 ) ) ) ( , ( ( ( a ( lieutenant colonel ) ) ( at ( the ( White House ) ) ) ) ( ( ( relayed ( to ( the NMCC ) ) ) ( that ( ( the ( Vice President ) ) ( had ( confirmed ( fighters ( were ( cleared ( to ( ( engage ( inbound aircraft ) ) ( if ( they ( could ( verify ( that ( ( the aircraft ) ( was hijacked ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (ADVP (RB Repeatedly)) (IN between) (NP (CD 10:14) (CC and) (CD 10:19))) (, ,) (NP (NP (DT a) (NN lieutenant) (NN colonel)) (PP (IN at) (NP (DT the) (NNP White) (NNP House)))) (VP (VBD relayed) (PP (TO to) (NP (DT the) (NN NMCC))) (SBAR (IN that) (S (NP (DT the) (NNP Vice) (NNP President)) (VP (VBD had) (VP (VBN confirmed) (SBAR (S (NP (NNS fighters)) (VP (VBD were) (VP (VBN cleared) (S (VP (TO to) (VP (VB engage) (NP (JJ inbound) (NN aircraft)) (SBAR (IN if) (S (NP (PRP they)) (VP (MD could) (VP (VB verify) (SBAR (IN that) (S (NP (DT the) (NN aircraft)) (VP (VBD was) (VP (VBN hijacked))))))))))))))))))))) (. .)))
There were ten fighters that were sent out to clear the skies.
( There ( ( were ( ( ten fighters ) ( that ( were ( ( sent out ) ( to ( clear ( the skies ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBD were) (NP (NP (CD ten) (NNS fighters)) (SBAR (WHNP (WDT that)) (S (VP (VBD were) (VP (VBN sent) (PRT (RP out)) (S (VP (TO to) (VP (VB clear) (NP (DT the) (NNS skies))))))))))) (. .)))