We (rightly) hear the numbers of men killed in Afghanistan; it's beginning to remind me of what my US schoolteachers told me about growing up in the Vietnam era. Eventually, with nothing positive to set against this cost, public opinion will force us out of the war. The absence of a negative isn't a positive; no new bombs in London could be because MI5 etc. are doing their jobs and nothing to do with the efforts of the Army several thousand miles away. I don't believe that myself, but I could imagine that argument gaining traction in a couple of years. Most journo's appear to be too lazy to investigate a complex situation in detail; I've never been there so only have what I read to go on. Is there a specific, measurable and realistic way to measure short- to medium term success in Afghanistan?