Physics Dept., NJIT, University Heights, Newark NJ 07102-1982 

We review the state of our knowledge of solar flares from the radio perspective, and what we have learned from radio observations during the previous solar maximum. The newly emerging understanding of the spatial and spectral characteristics of radio bursts are briefly outlined, where radio observations have been used to determine the geometry/topology of the coronal sources. Radio observations will be important in this regard to help place HESSI data in context. A more difficult problem is the use of radio information in conjunction with HESSI data to directly determine the energy and pitch-angle distribution of injected particles, and from this learn about the characteristics of the acceleration process. We consider prospects for using radio data, in conjunction with HESSI spectral and imaging data, to shed new light on such processes. Coordinated campaigns involving HESSI, radio, optical, and other data will be essential to bring this about.