Mu'ath al-Kasasbeh was captured by Daesh after his plane crashed over the militant's stronghold of Raqqa in Syria. He was on a mission with the US-led coalition against Daesh.
Daesh demanded a prisoner exchange in which Iraqi prisoner and convicted terrorist Sajida al-Rashawi would be brought to the Turkish border, Japanese hostage Kenji Goto would be released, and al-Kasasbeh's life would be safeguarded for the time being.
However the exchange fell through when Daesh failed to provide proof of life for al-Kasasbeh.
