Transmission of the Authorization from the White House to the Pilots The NMCC learned of United 93's hijacking at about 10:03.
( ( Transmission ( of ( ( the Authorization ) ( from ( ( the ( White House ) ) ( to ( ( the ( Pilots ( The NMCC ) ) ) ( learned ( of ( United 93 ) ) ) ) ) ) ) ) ) ) ( ( 's ( hijacking ( at ( about 10:03 ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Transmission)) (PP (IN of) (NP (NP (DT the) (NNP Authorization)) (PP (IN from) (NP (NP (DT the) (NNP White) (NNP House)) (PP (TO to) (NP (NP (DT the) (NNP Pilots) (NNP The) (NNP NMCC)) (VP (VBN learned) (PP (IN of) (NP (NNP United) (CD 93))))))))))) (VP (VBZ 's) (VP (VBG hijacking) (PP (IN at) (NP (QP (RB about) (CD 10:03)))))) (. .)))
The NMCC heard about the hijacking of United 93 at 10:03 when it was reported on CNN.
( ( The NMCC ) ( ( ( ( heard ( about ( ( the hijacking ) ( of ( United 93 ) ) ) ) ) ( at 10:03 ) ) ( when ( it ( was ( reported ( on CNN ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN NMCC)) (VP (VBD heard) (PP (IN about) (NP (NP (DT the) (NN hijacking)) (PP (IN of) (NP (NNP United) (CD 93))))) (PP (IN at) (NP (CD 10:03))) (SBAR (WHADVP (WRB when)) (S (NP (PRP it)) (VP (VBD was) (VP (VBN reported) (PP (IN on) (NP (NNP CNN)))))))) (. .)))