Got into a chat on Twitter today with some geographers, I think mainly UK scholars, about the serious side of the history of barbed wire. It seemed easiest to preserve in this Storify.
I took the picture below from a bus at the 2009 Tule Lake Pilgrimage. It shows a participant stepping through the ordinary farm-field barbed wire that now surrounds parts of the old camp site. She's walking over to join others in looking at the foundation of the former Block 73 latrine building.
There's now a proposal to fence off part of the site to visitors, stated purpose being airport safety. Don't know what kind of wire they have in mind.