An American peace activist has been deported from Australia after he was accused of being a threat to national security. On Saturday Scott Parkin was detained by six federal police and immigration officials as he sat at a cafe in Melbourne where he was teaching workshops on peaceful protest. He is best known for organizing protests around the military contractor Halliburton in this country and in Australia. The Australian government said he was deported earlier today. On Wednesday Parkin issued a statement saying “To this date, the only information that I have received is that I have been assessed as ’a direct or indirect risk to Australian national security.”