A family photo of ISIS beheading victim Alan Henning.
Aine Davis was arrested in 2015 near Istanbul and was part of the four-man ISIS cell nicknamed the Beatles. Shutterstock
Carl Mueller - the father of Kayla Mueller who was killed by ISIS militants - hugs one of Kayla's friends, Rodwan Safar Jalani, after the announcement of the guilty verdict for ISIS member El Shafee Elsheikh. AFP
Mr Mueller speaks to reporters outside a courthouse after the announcement of the guilty verdict for Elsheikh. AFP
Diane Foley - mother of James Foley, an American journalist who was kidnapped and later beheaded by ISIS members in Syria in 2014 - speaks after the announcement of the guilty verdict for Elsheikh. AFP
Ms Foley speaks after Elsheikh was convicted by a US federal jury of assisting in the kidnapping and deaths of four Americans. AFP
Freelance journalist James Foley was murdered by group known as the ISIS Beatles on August 19, 2014. The National
Carl Mueller speaks to reporters outside of the Albert V Bryan US Courthouse in Alexandria, Virginia. AFP
El Shafee Elsheikh was found guilty of engaging in lethal hostage-taking and conspiracy to commit murder. Reuters
Mohammed Emwazi was one of four British members of ISIS who were known as 'The Beatles'. AP
Diane Foley (centre) stands alongside Carl Mueller and Marsha Mueller as well as other family members of two other killed ISIS hostages. AFP
Members of ISIS group known as 'The Beatles', Alexanda Kotey and El Shafee Elsheikh, were captured in northern Syria in January 2018 and had their UK citizenships revoked. Reuters
Alexanda Kotey (left) and El Shafee Elsheikh were accused of being part of a group of four British extremists who made up an ISIS cell known as 'The Beatles'. AP
Mike Haines, the brother of murdered aid worker David Haines, speaks to the news media. Reuters