And ive been so tired starting my duties ,leaving Japan for a daylightflight home ,that the affects must have been worse than a couple of pints of sapporro the night before .Two things,if i had "gone sick" or declared myself fatigued ,my employer whould have been unimpressed to say the least and also ,in the UK at least ,anything that can be measured is sacred compared to tiredness which is more subjective but just as dangerous. A messed up peurile system ,just like security ,all IMHO of coures!