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After worldwide outrage of the video showing the murder of American journalist James Foley, the Pentagon says it tried to rescue him along with other US captives earlier in the summer but failed to locate them. Phil hears concerns that people are dying of sepsis because of a growing resistance to antibiotics. And after warnings that Iceland's Bardarbunga volcano could be about to erupt, volcanologist Professor Dougal Jerram explains how serious an eruption might be.