we're going to turn left right at the alcoa building -- see that building? it is totally made of aluminum. it is right across the street from the u.s. steel building, which is completely made of steel. they had kind of a theme going. the pittsburgh plate glass building is made entirely of glass. today pittsburgh is reinventing itself yet again, from being the smoky city of heavy industry, is now eds and meds. education and medicine. the biggest employer is the university of pittsburgh medical center that employs more than 50,000 people. education, smart technologies, uber is here, google is here, robotics centers. people come all over the globe to be educated at carnegie mellon university or the university of pittsburgh. there are more than 30 universities or colleges in the greater pittsburgh area. there is lots to see in pittsburgh. it would take you a week to see it all. what i say to america is stop on by, give pittsburgh a chance. it is not the city you might think it is. >> this weekend we are featuring the history of pittsburgh, pennsylvania. together