This is a picture of a border checkpoint between Assam and Arunachal Pradesh in northeastern India. Indian security personnel are pictured scrutinising the paperwork of everyone crossing the “Inner Line”. For Indian citizens access to Arunachal Pradesh is closely controlled and foreigners require a “Protected Area Permit” to make the journey. Residents of Arunachal Pradesh can move freely but their paperwork is still supposed to be checked each time they cross the state frontier. This is one of the more substantial and heavily policed “intra-national” borders I think I am ever likely to see.