Mush, mush, mush, mu....wait what were we doing?

Every human competitor now running the Iditarod Trail Sled Dog Race will be tested for alcohol and illegal drugs on the trail for the first time in the history of the 1,100-mile race - a change defending champion Lance Mackey believes is directed at him. No matter who it's directed at I'm pretty sure a lot of the competitors do one or the other. It's an 1,100 mile race in freezing temps in the middle of no where, alone. What else are they sposed to do? If they do this I'm pretty sure they won't have any competitors. Click on the pic for the full story.