(S (S (PP (IN In) (BASENP (DT a) (NN first))) (COMMA ,) (S (BASENP (DT the) (NNP Shuttle)) (VP (ADVP (RB also)) (VP (VP (VP (VBD performed) (BASENP (DT a) (JJ slow) (NN back-flip))) (PP (IN in) (NP (BASENP (QP (DT some) (NN 180)) (NN m)) (PP (IN from) (BASENP (DT the) (NNP ISS)))))) (S (VP (VBG enabling) (S (NP (BASENP (DT the) (JJ two-man) (NN crew)) (PP (IN of) (BASENP (DT the) (NN space) (NN station)))) (VP (TO to) (VP (VB take) (NP (BASENP (JJ high-resolution) (NNS images)) (PP (IN of) (NP (BASENP (DT the) (NN underside)) (PP (IN of) (BASENP (DT the) (NNP Orbiter))))))))))))))) (PERIOD .))