The Guardian are running a new assignment under their guardianwitness guise with the question ‘Are you hemmed in by a separation wall or security fence?’, inviting readers to document their own experiences.

It’s been running for only a few days but there’s a full month left for contributions. Expect Israel/Palestine to figure heavily of course, but there are already contributions on Mogadishu airbase, the Moroccan wall, the Belgium-Netherlands border, Belfast and the Sonoran Desert. I’ll report again when the project closes.