article_snippet.sent: Yesterday Mr Cameron pledged the UK would 'make a contribution' to search and rescue operations.
article_snippet.sent: We've got to act on search and rescue, and that is about basic humanity
article_snippet.sent: London Mayor Boris Johnson said Britain had a 'moral duty' to do more. '
article_snippet.sent: I think it is an absolute tragedy and obviously Britain must do whatever Britain can to help the humanitarian response,' London Mayor Boris Johnson said.