CHICAGO - Representatives from 28 countries will be in Chicago this weekend for the NATO Summit. The meeting is bringing heightened security to the windy city and that includes changes to South Shore train service.

President Obama chose his hometown of Chicago to host this year's meeting. While it's a big honor for the city, it's becoming a logistical nightmare for anyone wanting to get to or around town this weekend.

Restrictions on the South Shore will start Saturday as trains will not make stops at 2 stations, McCormick Place and Museum Campus/11th Street.

But the biggest changes will happen on the days of the summit. Anyone traveling Sunday or Monday can expect rigorous security checks at stations and on the train. And police canine units will be at all security checkpoints.

Significant delays are expected because of screening and Monday, 11 trains going to and from Millenium Station are cancelled.

There will also be restrictions on what you can bring on the train, including a ban on food and liquids.

For a full list of all South Shore restrictions and cancellations for this weekend click here.