David Cameron is a big international figure but what will he do as UK foreign secretary?

News Snapshot:

When Margaret Thatcher appointed Lord Carrington, the last Conservative foreign secretary based in the House of Lords, she said she had done so because he only had to walk into a room to establish his natural authority. Although Carrington admired her sense of duty, the compliment was not completely returned. He once confided: “I think she had hardly been outside the country. From my point of view this was a considerable advantage for she could hardly contradict me when I told her where Rhodesia was.” He also occasionally chided his prime minister in meetings with visiting presidents, passing her notes:...