Today I got a cool cover from the USA! The cover was sent from Supai, Arizona, which is the capital of the Havasupai Indian Reservation. It has a population of 208 and is currently the most remote community in the lower 48 states. It can only be reached via helicopter, hiking, or by mule. All mail to and from Supai travel by mule train and they are postmarked with a special postmark to indicate this. It is the only mail to be delivered via mule train and a nice video about it can be seen here. It was postmarked on Oct. 1, 2013.