Richard E. Lingenfelter
         University of California, La Jolla, CA
James C. Higdon
         Claremont Colleges, Claremont, CA
Reuven Ramaty
         Goddard Space Flight Center, Greenbelt, MD

We review the evidence for cosmic ray acceleration in the superbubble/hot phase of the interstellar medium, and discuss the implications for the composition of cosmic rays and the structure and evolution of the interstellar medium.