Registration is now open for the June 6-7, 2016, U.S.-European Union (EU) “Bridging NanoEHS Research Efforts” joint workshop. The workshop will bring together the U.S.-EU Communities of Research (COR), which serve as a platform for U.S. and EU scientists to share information on nanotechnology environmental, health, and safety (nanoEHS) research. The goal of the workshop is to publicize progress towards COR goals and objectives, clarify and communicate future plans, share best practices, and identify areas of cross-COR collaboration. The workshop will also feature a COR-led nanoEHS scrimmage in which the communities will collectively respond to a hypothetical spill of a nanotechnology-enabled product. The workshop is free and open to the public with registration on a first-come, first-served basis.