We briefly review the Color Glass Condensate (CGC) formalism and its applications to high energy heavy ion collisions at RHIC and LHC. We argue that the observed suppression of the single inclusive hadron production spectra and the preliminary data on the disappearance of back to back correlations in dA collisions at RHIC indicate that the CGC may have been observed at RHIC. We propose measuring, and provide quantitative predictions for, the electromagnetic signatures of CGC, such as photons and dileptons, in forward rapidity dA collisions at RHIC in order to verify/falsify CGC as the dominant physics in the forward rapidity region at RHIC which will help clarify the role of CGC physics in formation of a Quark Gluon Plasma in mid rapidity heavy ion collisions at LHC. Based on: 1) SATURATION PHYSICS AND DEUTERON-GOLD COLLISIONS AT RHIC. By Jamal Jalilian-Marian, Yuri V. Kovchegov. 2) ELECTROMAGNETIC SIGNATURES OF THE COLOR GLASS CONDENSATE: DILEPTONS. By Jamal Jalilian-Marian