Don Ellison led discussion this week on the paper "Morphological evidence for azimuthal variations of the cosmic ray ion acceleration at the blast wave of SN 1006," by Cassam-Chenai et al. This paper deals with evidence in the remnant of SN 1006 for cosmic ray acceleration taking place at the forward shock. The evidence claimed in the paper is the close proximity of the forward shock radius to that of the contact discontinuity, which is predicted by theory if there is efficient cosmic ray acceleration at the shock, leading to a lower effective value of gamma, and thus a lower compression ratio behind the shock. Azimuthal variations in this ratio is also seen around the periphery of the blast wave, possibly due to different obliquity angles of the forward shock with the magnetic field of the ISM.