Memo to Pres. Obama: The microphones are very sensitive

While in Seoul, Korea for various summit-like activities, Pres. Obama was finishing up a 90-minute private conversation with Russian Pres. Dmitri Medvedev and the press was filing in. Obama, apparently believing that he could finish one last not-for-publication remark before the reporters were in earshot, underrated the power of the microphones those reporters carry. The exchange: "Obama: On all.