Omar Khadr was detained at Guantanamo Bay.
A Canadian captured by American forces in Afghanistan at the age of 15 , Omar Khadr is currently on interim release from prison in Canada pending an appeal of his war-crimes conviction before a military commission in Guantanamo Bay . Omar Ahmed Sayid Khadr ( born September 19 , 1986 ) is a Canadian who was detained at Guantanamo Bay as a minor and held there for 10 years . After being detained at Bagram , he was sent to Guantanamo Bay detention camps , in Cuba . He was the youngest prisoner and last Western citizen to be held by the United States at Guantanamo Bay .