The Vice President authorized fighter aircraft to engage the inbound plane.
( ( The ( Vice President ) ) ( ( ( authorized ( fighter aircraft ) ) ( to ( engage ( the ( inbound plane ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNP Vice) (NNP President)) (VP (VBD authorized) (NP (NN fighter) (NN aircraft)) (S (VP (TO to) (VP (VB engage) (NP (DT the) (JJ inbound) (NN plane)))))) (. .)))
Fighter aircraft were authorized to engage the plane.
( ( Fighter aircraft ) ( ( were ( authorized ( to ( engage ( the plane ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Fighter) (NN aircraft)) (VP (VBD were) (VP (VBN authorized) (S (VP (TO to) (VP (VB engage) (NP (DT the) (NN plane))))))) (. .)))