Bloomberg article (way down at the bottom) talking about a "significant airborne release" of Cesium-137 somewhere in the world (related to the radioactive shoes and sneakers, no doubt)
"Elsewhere, however, the event was detected, if not immediately noted. Radionuclide monitoring stations more than a thousand kilometers away in Malaysia and in the remote Australian territory the Cocos Islands - part of a global network of sensors deployed by the Vienna-based Comprehensive Nuclear-Test-Ban Treaty Organisation - picked up traces of radiation, Indonesian officials would later be informed. A unit of the US Department of Energy would say in a preliminary assessment seen by Bloomberg News that detections by two different stations at that distance suggests “a significant airborne release” of Cesium-137.'"
