Jordanians gather outside a mosque during Friday prayers, following a demonstration against the Islamic State group and demanding the freedom of Jordanian pilot Maaz al-Kassasbeh, in downtown Amman on December 26, 2014. Maaz, a 26-year-old first lieutenant in the Jordanian air force, was captured by the Islamic State group earlier this week after his F-16 jet crashed while on a mission against the jihadists over northern Syria. AFP PHOTO/ KHALIL MAZRAAWI