International Particle Physics Outreach Group
The International Particle Physics Outreach Group (IPPOG) is a network of scientists, educators, and communicators from several countries that works to improve the public's understanding and appreciation of particle physics.
IPPOG started out as the European Particle Physics Outreach Group (EPPOG) in 1997 with the sponsorship of the European Committee for Future Accelerators (ECFA) and the High Energy Particle Physics Board of the European Physical Society (EPS-HEPP).
In November 2012, EPPOG became IPPOG and soon after added the US as its first country member, followed by Israel, Ireland, Slovenia, Australia and South Africa.
IPPOG works in collaboration with particle physics laboratories and experiments, including CERN, the Pierre Auger Observatory, DESY, and GSI.
For more information, see Wikipedia.