  In this brief review of the observable effects of minijets in heavy-ion
collisions the main points emphasized are that the quadruple moment
$v_2(p_T,b)$ and the hadronic ($\pi$ and $p$) spectra at low $p_T$ can both be
reproduced by minijet contributions to the recombination of thermal and shower
partons. Without using hydrodynamics the minijet approach does not trace the
evolution of the expanding system. The thermal distribution of the medium
partons at the time of hadronization is assumed, but rapid thermalization
initially is not required so as to allow minijets to leave their footprints on
the system in the final state. Azimuthal anisotropy due to minijets is directly
calculated in the momentum space without any fluid assumption relating the
spatial eccentricity to $v_2$. There are no more parameters used, compared to
the hydro approach in fitting the data on $v_2$ and $p_T$ spectra. Thus both
approaches satisfy the sufficiency condition for a viable description of the
dynamical process involved.
