A novel QCD phenomenon, discovered in high multiplicity proton-proton and proton-nucleus collisions at the LHC, is the azimuthal collimation of pairs of charged hadrons that are widely separated in rapidity. We argue that these long range in rapidity ``ridge" correlations provide distinctive images of  the structure of chromo-electromagnetic
fields at very early times in these collisions. In particular, the systematics of the phenomenon provides evidence both for Balitsky-Fadin-Kuraev-Lipatov (BFKL)
renormalization group dynamics as well as gluon saturation in high energy QCD. Alternative scenarios, which interpret the ridge phenomenon in terms of collective flow are also discussed.