James Foley, from Illinois, USA, was a journalist who first went missing in November 2012
James Foley, from Illinois, in the US, was a journalist who first went missing in November 2012.
On his way to an internet cafe, while reporting for the GlobalPost, he had been taken hostage at gunpoint by militants from the group Jabhat al Nusra in Taftanaz, northern Syria.
Jabhat al Nusra subsequently joined forces with ISIS - which did not exist in anything like its current form when Mr Foley was taken.
Mr Foley joined other prisoners, who were European and British, in the ISIS prison and despite attempts to rescue him, he was eventually murdered by his captors.
His fellow prisoners spoke kindly of Foley, who called people 'Bro' and never argued over shortages of food, despite meagre rations equating to cup of food-a-day, often sharing his portion and his blanket.
Mr Foley often made efforts to maintain prisoners' morale, persuading them to play games and to give talks on their favourite subjects.
He even organised a 'Secret Santa' during Christmas 2013, encouraging hostages to make gifts out of whatever they could find.
ISIS posted his execution video, titled 'A Message to America' to social media as proof of his death.
In scripted remarks before his killing, kneeling in an orange jump suit, he said: 'I wish I could have the hope of freedom and seeing my family once again.
'But that ship has sailed. I guess all in all I wish I wasn't American.'
'The guy lit up a room': US freelance journalist who was an avid rugby player
Steven Sotloff, 31, from Miami, who freelanced for Time and Foreign Policy magazines, vanished in Syria in 2013
US journalist Steven Sotloff, 31, vanished in Syria in August 2013.
Mr Sotloff was not seen again until he appeared in a video released online by ISIS on August 2014, that showed James Foley's beheading.
In a second clip, published weeks later, entitled 'A Second Message to America,' Mr Sotloff appeared in a orange jumpsuit before he is beheaded by an Islamic State fighter.
The grandson of Holocaust survivors, Mr Sotloff grew up Miami, before attending the Kimball Union Academy boarding school in New Hampshire before studying at the University of Central Florida.
While at Kimball, Mr Sotloff was an avid rugby player and on moving to UFC began working for the student newspaper there, the Central Florida Future.
He left this paper in 2005 and began to pursue his dreams of journalism full time.
'The guy lit up a room. He was always such a loyal, caring and good friend to us,' former roommate Josh Polsky told the New York Times.
'If you needed to rely on anybody for anything he would drop everything on a dime for you or for anyone else.'
Sotloff travelled to the Middle East as a freelance journalist and wrote reports from Bahrain, Egypt, Libya, Turkey and Syria.
He often had pieces in Time and Foreign Policy magazines.
'A million people could have told him what he was doing was foolish, as it seemed to us outsiders looking in, but to him it was what he loved to do and you weren't going to stop him,' his friend, Emerson Lotzia, said.
'Steve said it was scary over there. It was dangerous. It wasn't safe to be over there. He knew it. He kept going back.'British taxi driver who volunteered as an aid worker
Alan Henning, a father-of-two, was kidnapped on Boxing Day 2013 as he delivered aid to Syrian refugees
Alan Henning, a father-of-two, was kidnapped on Boxing Day 2013 as he delivered aid to Syrian refugees.
The taxi-driver, from Manchester, was kept hostage until he was beheaded by Jihadi John on video in October 2014.
Before he was killed, Mr Henning was forced to tell the camera that he was being murdered in retaliation for parliament's decision to attack ISIS.
Originally from Salford, he had seen the suffering first hand during a life-changing visit to a refugee camp, which inspired him to help the innocents whose lives were being wrecked by the conflict.
After volunteering with a Muslim charity, the 47-year-old agreed to drive 3,000 miles in a convoy of old ambulances to help the aid effort and take much-needed medical supplies to hospitals in the northern Syrian province of Idlib.
Known as 'Gadget' to friends and family for his fondness for technology, Mr Henning had been washing cars in the UK to raise money for donations before setting off on his fourth visit to the country.
He travelled with eight others from charity Al-Fathiha Global, who intended to deliver vital equipment, including NHS ambulances packed with baby milk, nappies, food and defibrillators, but was kidnapped by ISIS extremists on Boxing Day, shortly after making the 4,000-mile journey to the town of Al-Dana.
A fan of Phil Collins, which he enjoyed playing as he drove, Mr Henning was incredibly popular and during one trip insisted on sleeping inside his ambulance instead of