I have some concerns about drug testing in general because I think it does distract from the real issue, which is actually fatigue and other forms of impairment in a workplace. If you have people who are incentivised to work very, very quickly—it was happening on the port, and it has been discussed recently; if you have people who are very fatigued by the types of shifts they are on; if you have people on various drugs, or they're just fatigued because their lifestyle is out of kilter, then you can have really bad accidents. And this kind of approach, where we focus on and demonise always the employee, actually tends to distract from some of the actual causes of workplace fatalities and serious injuries. 