  We report new results from a sub-parsec scale study of the inner jet in M87
performed at 15 GHz with the Very Long Baseline Array. We have detected a limb
brightened structure of the jet along with a faint 3 mas long counter-feature
which we also find to be limb brightened. Typical speeds of separate jet
features are measured to be less than 0.05 speed of light, despite the highly
asymmetric jet structure and the implications of the canonical relativistic
beaming scenario. The observed intrinsic jet structure can be described in
terms of a two stream spine-sheath velocity gradient across the jet according
to theoretical predications based on the recently discovered strong and
variable TeV emission from M87. The jet to counter-jet flux density ratio is
measured to be greater than 200. The observed intrinsic jet structure is
broadly consistent with theoretical predictions of a spine-sheath velocity
gradient suggested by recently discovered TeV emission from M87.
