US authorities have known for weeks that they have suffered a haemorrhage of secret information on a scale which makes even the leaking of the Pentagon Papers during the Vietnam war look limited by comparison. The Afghan war logs, from which the Guardian reports today, consist of 92,201 internal records of actions by the US military in Afghanistan between January 2004 and December 2009 – threat reports from intelligence agencies, plans and accounts of coalition operations, descriptions of enemy attacks and roadside bombs, records of meetings with local politicians, most of them classified secret. The Guardian's source for these is...