hand ▁boost er ▁is ▁new , ▁while ▁the ▁upper ▁cyl inder ▁on ▁the ▁left ▁boost er ▁fle w ▁with ▁ST S - 1 ▁– ▁the ▁historic ▁ma iden ▁flight ▁of ▁Space ▁Sh utt le ▁Columbia . ▁( For ▁detailed ▁information ▁on ▁the ▁ST S - 1 3 5 ▁boost ers , ▁see ) ▁ ▁After ▁comple ting ▁the ▁assembly ▁process , ▁the ▁E T - 1 3 8 ▁was ▁m ated ▁to ▁the ▁SR B s ▁on ▁ 2 5 ▁April . ▁ ▁Vis it ▁by ▁President ▁Ob ama ' s ▁family ▁President ▁Bar ack ▁Ob ama , ▁his ▁wife ▁Mich elle ▁Ob ama , ▁and ▁their ▁daughters , ▁Mal ia ▁and ▁S asha , ▁viewed ▁Atl ant is ▁at ▁the ▁Or b iter ▁Process ing ▁Fac ility ▁( OP F - 1 ) ▁on ▁their ▁visit ▁to ▁the ▁Kennedy ▁Space ▁Center ▁on ▁ 2 9 ▁April ▁ 2 0 1 1 . ▁The ▁president ' s ▁family ▁missed ▁the ▁launch ▁of ▁Ende av our ▁on ▁the ▁ST S - 1 3 4 ▁mission , ▁as ▁the ▁first ▁launch ▁attempt ▁was ▁scr ub bed ▁due ▁to ▁problems ▁with ▁two ▁he aters ▁on ▁one ▁of ▁Ende av ours ▁auxili ary ▁power ▁units ▁( AP Us ). ▁ ▁During ▁their ▁tour ▁of ▁the ▁Or b iter ▁Process ing ▁Fac ility , ▁the ▁president ' s ▁family ▁was ▁accompanied ▁by ▁United ▁Space ▁Alliance ▁tile ▁techn ician ▁Terry ▁White ▁and ▁astr onaut ▁Jan et ▁K av and i . ▁Stand ing ▁under ▁the ▁wings ▁of ▁Space ▁Sh