Methamphetamine and amphetamine were given to Allied bomber pilots to sustain them by fighting off fatigue and enhancing focus during long flights. The experiment failed because soldiers became agitated, could not channel their aggression and showed impaired judgment.[91] Rather, dextroamphetamine (Dexedrine) became the drug of choice for American bomber pilots, being used on a voluntary basis by roughly half of the United States Air Force pilots during the 1991 Gulf War, a practice which came under some media scrutiny in 2003 after a mistaken attack on Canadian troops