In 2002, two American fighter pilots, Major Harry Schmidt and Major William Umbach, killed four Canadian soldiers near Kandahar, Afghanistan, because the pilots mistakenly thought the Canadian soldiers were shooting at them. Their court defence attributed the pilots’ actions to the Air Force-issued stimulant drugs they were taking at the time. The pilots had been taking the stimulant Dexedrine during the flight, under the standard-order guidelines of their commander. Today, when pilots are finished with their missions, they are provided with Ambien or Restoril, the “no-pills,” to bring them down and help them sleep and adjust after defying the body’s circadian rhythms and altering neurotransmitter levels with amphetamines. The lawyer for Major Schmidt noted that the depressant sleep aid Ambien, which was given to Schmidt to help him sleep before the mission, also affected his mental state when he bombed the Canadians.