hanover germany u.s. president barack obama slip pair virtual reality glass bedeck plastic googly eye muse someday use technology talk daughter leave home college display one many stop two-hour tour hanover messe world large trade show industrial technology tour de force economic diplomacy obama german chancellor angela merkel brave new world obama say doff glass move next elaborate booth obama often tour american businesses factories often spend time world leaders marathon tour merkel sign much leaders want conclude talk eu-u.s. trade deal obama presidency end jan. 20 another chance tell everyone come buy make america obama say high-profile visit way promote benefit trade economy say michael froman u.s. trade representative negotiate transatlantic trade investment partnership ttip help underscore build wall around u.s. froman say interview merkel personally invite obama feature u.s. businesses trade fair almost 400 u.s. businesses represent time tour resemble protract television infomercial leaders grip hand-held microphones ask exhibitors products herd photographers gallop station station keep chancellor merkel scientist figure quickly obama say examine gekko gripper modest silver device able grab hold space debris remind spiderman obama say earthbound application siemens booth chief executive joe kaeser present obama pair golf club design use company software nod president favorite weekend pastime go teach angela play obama say pose photo several stop feature 3-d printers obama joke might soon buy one start design things get office go lot time hand say obama take role america 's pitchman german trade show