U.S. President Barack Obama and German Chancellor Angela Merkel have agreed to a meeting of U.S. and German security officials in the coming days to discuss allegations that the National Security Agency eavesdropped on 500 million phone calls, emails, and other data passing through Germany ... Foreign policy expert Sergey Lagodinsky, with the Global Public Policy Institute in Berlin, suggests that, in the wake of the allegations, the Obama administration should consider public diplomacy.