Sometimes those of us who live in the city can forget what a big deal the Bank of America Chicago Marathon is. Well, not really, that would be pretty hard to do considering just what a big deal it actually is. But, when you’re used to living in the city (and maybe you have a few Chicago Marathons under your belt) you can forget that this is a World Marathon Major (an elite group of marathons that only includes Berlin, Boston, Chicago, London, New York City and Tokyo). And while we may just be taking the train downtown to run on October 12th, people will be coming from all over the world to run this marathon. Joe O’Reilly is one of those people. Coming in from Dublin next month, Chicago will mark O’Reilly’s 7th marathon (he’s previously completed four in Ireland as well as Paris and Berlin). Four years ago he wouldn’t have guessed he’d be making this trip. “I got into running as part of a weight-loss journey I took four or so years ago where I lost about 90-95 pounds,” says O’R