I am arriving on a United flight at Terminal A. I have one hour layover for another United flight to another US state. I understand it is best to use the shuttle which keeps me within "security". Three questions: #1. How much time does it take to get from Terminal A to Termincal C? #2. Which gate in Terminal A do I find the shuttle? #3. I go through customs in Canada (departing from Canada) and I understand I do not go through custom again - can someone confirm this.