(S (S (BASENP (JJ U.S.) (NN military)) (VP (VBZ says) (SBAR (S (BASENP (DT such) (NN driving)) (VP (VBZ is) (ADJP (JJ necessary) (S (VP (TO to) (VP (VP (VB protect) (BASENP (DT the) (NNS troops))) (PP (IN from) (BASENP (NN attack)))))))))))) (PERIOD .))