The data are the outcome of the high energy particle physics experiments conducted at CERN (the European Organization for Nuclear Research). The main focus for CoEPP experimentalists is the ATLAS data produced by the Large Hadron Collider at CERN. The ATLAS detector is searching for new discoveries in the head-on collisions of protons of extraordinarily high energy. ATLAS will learn about the basic forces that have shaped the Universe since the beginning of time and that will determine its fate. Among the possible unknowns are the origin of mass, extra dimensions of space, unification of fundamental forces, and evidence for dark matter candidates in the Universe. CoEPP theoreticians also produce a vast amount of data to explore phenomenological consequences of new physics models. This data are needed to direct searches for new physics at the LHC.