The war photographer Paul Conroy who was severely injured in Syria has said he believes that most of the footage shot by citizen journalists and activists is genuine but has warned that it is often not possible to verify them.
He told HARDtalk's Stephen Sackur the need would continue for professional journalists and photographers to go into conflict zones to witness events first hand. Mr Conroy suffered serious leg injuries in an attack on Homs in February in a shelling which left two other journalists dead.
You can watch the full interview on BBC World News on Monday 16 April at 03:30, 08:30, 15:30 and 20:30 GMT and on the BBC News Channel on Monday 16 April at 04:30 BST and Tuesday 17 May at 00:30 BST.
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