  We discuss the recent NA50 J/Psi production data in Pb--Pb collisions, in
particular the second drop at high transverse energies which correspond to the
most central collisions. Using a model which relates the J/Psi suppression to
the local energy density, we show that the data can be explained by taking into
account transverse energy fluctuations at a given impact parameter. Predictions
of this model for RHIC are briefly discussed.
