arriving just moments ago here in his hometown of chicago to give his final address to the nation. in this hall before some 20,000 friends and supporters who will gather here at the president s side tonight, the first lady. tomorrow morning s return trip to the white house will mark their final scheduled trip on board air force one. there is a lot of excitement in the air tonight, people getting ready, filing in hours early. free tickets to this historic speech. of course now some selling for um to $5,000 according to the chicago sun-times tonight. the president has been planning his good-bye speech himself. he s been doing it for weeks and he s gone through at least four drafts, making last-minute edits on the flight here. the presidential farewell address is a tradition that goes back to george washington. this will be the first given by a departing president from his hometown. barack obama s presidency was born in this city on election night in 2008. we all remember a quarter