Run, Event and Detector Response WG Work plan 2009 1] Parallel navigation - Finalize - Co-work with Geometry and Generic Processes WGs 2] Command-based scoring - Finalize box and cylindrical mesh types - Introduce spherical mesh 3] Prototype multi-core extension of Geant4 Gene Cooperman and his student, Xin Dong, developed a prototype thread-parallel version of Geant4 (event-level parallelism) to take advantage of multi-core processors. In this prototype all global data is made thread-local (thread-private). Future work will concentrate on enhancing the spatial locality of the code to better use the limited cache.