Customs and Border Patrol operate under a special set of circumstances within ports of entry. You do not have the right to have an attorney present during the interrogation, you can have your personal belongings confiscated, you can be held without charge for up to four hours for any "reasonable" suspicion.

These same rules apply within one hundred miles of the United States border. So if you live near the any ocean, Great Lakes, the Mexican border or Canadian border, you live under a different set of rights than the rest of America.