It is a year since the US Supreme Court ruled in the Holder vs. Humanitarian Law Project case. In doing so they upheld the constitutionality of a law that makes it illegal for US citizens or organisations to engage in many ways that are crucial to conflict transformation. Peacebuilders must be able to engage with proscribed actors. Speaking at a seminar in Sweden, Andy Carl marked the ruling's anniversary by highlighting the serious implications for peacebuilding of anti-terrorist and material support laws. Read the full presentation here.