The Supreme Court turned away an appeal Monday from a Yemeni man detained at Guantanamo Bay who believes he should be released because the war in Afghanistan has ended.

Moath al-Alwi, a Yemeni citizen, was captured in Pakistan in 2001 not long after the start of American operations in Afghanistan and has been detained at Guantanamo Bay since January 2002. In his 17 years in detention, al-Alwi has not been charged or sentenced, but the federal government has categorized him as a Taliban or al Qaeda fighter.