you write in your book, for most americans living in the mid-19th century there was less government wetzel society that forge a nation. the market to our religion, and americans unique history which kept government that they, they believed to mike treating national unity. >> that's right. all of those factors were important to. americans thought it was natural . the market. in fact, the market, especially the sooner the, the second half of the 19th century, very much a construction of the national government, especially the national ports system. let's take something as simple as sending processed meat across state lines. we are pretty familiar with this from the late 18th-century, corporate hackers. meatpackers operating in chicago that began to process these packages. they wanted to come across state lines. a lot of locals were not so happy about this. and what is -- a number of states argued, this was a healthy. cattle need to be inspected on site in the state. now, state health inspection fear the law extending local and state, it is only when the supreme court decided in the late 18th

for the wetzel family riding the subways comes with a warning.tform edge but on saturday he abandoned his own advice. >> as we approached this area about 20 feet, you could see a woman lying on the tracks there, and i had the three little ones and had to make a decision about going. >> reporter: to make that decision, greg looked to see when the next train was due to barrel through. you looked up at the clock t said two minutes? >> that's when it said two minutes. >> the woman was unconscious, with his kids watching, greg jumped in to move her away from the deadly third rail and towards the platform. >> regardless of how much you weigh, again, dead weight of a human being is heavy, unusually so, you'd be surprised. >> did she respond at all? >> no the at all. >> reporter: with time at a minimum, he raced to come one a plan b, getting her to the gap between the tracks. >> i felt if i could at least maneuver her in that area and jump out, worst case scenario the train would roll over here. the way she was laying she was across the tracks. >> report