CHicago.........Good advice here. Just pack what you normally would for a 2 week trip. It is starting to get cold here at night so you will need a light coat. If you try to speak Spanish here and butcher it.......They are VERY forgiving.....Believe me I know (I live it every day). Be vigilant about your valuables but don't be paranoid....Good and bad people here (as there is in Chicago).