 In January 2005 , Churchill 's work attracted controversy because of the circulation of a 2001 essay , " On the Justice of <unk> <unk> " , in which he argued the September 11 attacks were a natural and <unk> consequence of unlawful US foreign policy over the latter half of the 20th century ; the essay is well known for Churchill 's use of the phrase " little <unk> " to describe the " <unk> corps " working in the World Trade Center . 
