Japanese Coast Guard vessels sail alongside Japanese activists' fishing boat, not in photo, warning the activists away from a group of disputed islands called Diaoyu by China and Senkaku by Japan. Emily Wang/AP hide caption

itoggle caption Emily Wang/AP

Jet diplomacy: A B-52. According to reports, two flew through an area that China now claims is within its air defense zone. Andy Rain /EPA/Landov hide caption

itoggle caption Andy Rain /EPA/Landov