This week, we're remembering American journalist James Foley, days ahead of what would have been his 47th birthday. James was one of the first Western hostages to be killed by the Islamic State group. Now, after a six-year-long wait, two of his alleged killers are in the US, facing trial. Both men, who have been stripped of their British nationality, have pleaded not guilty to torture and murder. We speak to James's mother, Diane Foley.