BBC Radio 4 has been thinking about photojournalism over the past 24 hours:

Are Haiti pictures too graphic?

Save the Children aid worker Ishbel Matheson and former Guardian picture editor Eamonn McCabe discuss the question of “disaster porn” and whether you can tell the story properly without showing graphic images on the Today programme.

Meanwhile, Overexposed

tells the story of a group of photojournalists who set out to witness world events. Two of them were shot dead. A look at the power (or not) of photography to change the world.

CIARA LEEMING