The heightened levels of stress that are associated with serving for long periods of time in Afghanistan or, in the past, Northern Ireland are bound to have an effect, and alcohol comes into that picture.I do not want to apportion any blame, but it is also true that some have said that the armed forces cannot be held responsible for the people they recruit if they have a pre-existing propensity to be involved with social problems, if I can put it as generally as that.