When they learned a second plane had struck the World Trade Center, nearly everyone in the White House told us, they immediately knew it was not an accident.
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(ROOT (S (S (SBAR (WHADVP (WRB When)) (S (NP (PRP they)) (VP (VBD learned) (SBAR (S (NP (DT a) (JJ second) (NN plane)) (VP (VBD had) (VP (VBN struck) (NP (DT the) (NNP World) (NNP Trade) (NNP Center))))))))) (, ,) (NP (NP (RB nearly) (NN everyone)) (PP (IN in) (NP (DT the) (NNP White) (NNP House)))) (VP (VBD told) (NP (PRP us)))) (, ,) (NP (PRP they)) (ADVP (RB immediately)) (VP (VBD knew) (SBAR (S (NP (PRP it)) (VP (VBD was) (RB not) (NP (DT an) (NN accident)))))) (. .)))
Most people assumed the Russians were the ones responsible.
( ( Most people ) ( ( assumed ( ( the Russians ) ( were ( ( the ones ) responsible ) ) ) ) . ) )
(ROOT (S (NP (JJS Most) (NNS people)) (VP (VBD assumed) (SBAR (S (NP (DT the) (NNPS Russians)) (VP (VBD were) (ADJP (NP (DT the) (NNS ones)) (JJ responsible)))))) (. .)))