63 country delegations including the united states. we expect about 7500 delegates. about 22,000, 2500 media both foreign and dough most domestic coming in. there are foreign personal we think. 15 to 17,000 people will be in the city for the summit. reporter: topping it all off you have the white sox and cubs playing crosstown rivalry series in wrigley starting on friday. plenty going on. police will be put to the test, jon. jon: a lot of deep dish pizza to be served i think? reporter: you bet. jon: steve brown, thanks. jenna: in the presidential election all about the battleground states. why some of those states are more critical than others. we re going to break down the so-called super swing states that could actually decide who wins in november and tell you why they re so important. that s ahead. also some new fears about a very popular antibiotic, now linked to deadly heart problems.
military spending in general. there have been some exceptions, and most notably, tuesday night in bridgeport, a group of protesters were met by locals who didn t take kindly to those folks being in their neighborhood, and there were some words exchanged, not all of them appropriate for broadcast. when you keep in the mind of all of the protests, then all of the dignitaries coming in here and don t forget about those invited guest as well. as of today we re up to 63 country delegations including the united states. we expect about 7500 delegates, about 2,000 to 2500 media, both foreign and domestic, will be coming in. and then there s all the support personnel, so we think someplace between 16 and 17,000 people will actually be in the city for the summit. reporter: and already people here in the city of chicago have been hearing all about this for monthses and a lot this week. they re already starting to grumble via twitter and other