Several experimental signals observed
at RHIC might indicate creation of QGP or, alternatively, might be due
to some complicated initial state dynamics (Color Glass Condensate,
CGC), or an interplay of both phenomena could be taking place. These
phenomena include the suppression of high 
particles in AA
collisions as compared to pp collisions. The suppression is not as big
as predicted by QGP models, being about a factor of 2 or so. This
indicates a possibility that suppression is only due to a nuclear
effect such as nuclear shadowing in the wave functions of the
colliding nuclei. To resolve this issue experiments at RHIC are taking
data for deuteron-nucleus collisions. The idea is to see if the
high- suppression takes place in a collision of a simple particle
with a nucleus, where no one expects plasma to be formed. (Ideally one
would want to have pA collisions but for accelerator-related reasons
deuterons where chosen instead of protons.) If the high-
suppression will be seen in dA in the amounts comparable to the one
observed in AA than one can conclude that the suppression is entirely
due to initial state effects. Otherwise a creation of some sort of
dense matter would be confirmed at RHIC. While data has still not been
published Dmitri Kharzeev (BNL) and myself are involved in
understanding of CGC's prediction of Cronin enhancement and high-
suppression in dA collisions. We now understand that CGC predicts both
effects: however numerical estimates are still in progress.
To support the experimental program of studying 
collisions at the
LHC in CERN I have contributed to the Yellow Report on ``PDFs,
shadowing and pA''.
In continuation of my previous work on particle production in heavy ion collisions I have contributed to the proceedings of the RIKEN BNL Research Center Workshop on ``Current and Future Directions at RHIC''.