  This talk will discuss how heavy ion experiments, when moving from SPS (10 +
10 GeV) to RHIC (100+100 GeV) and to LHC (2750+2750 GeV), will enter a new
domain of QCD in which the production of even large pT gluons is so abundant
that it is simultaneously perturbative but such that the phase space density of
gluons is saturated. The saturation scale is estimated, quantitative numbers
for the initial production of gluons at the LHC are given and options for their
subsequent evolution are outlined. For parametrically large nuclei and
energies, classical field methods will be applicable.
