Progress toward Ascertaining the Explosion Mechanism for Core Collapse Supernovae and their Observables

The core collapse supernova problem - i.e., identifying the explosion mechanism or mechanisms responnsible for the demise of massive stars and determining the neutrino, gravitational wave, and nucleosynthesis yields from those events -- has challenged modelers for more than four decades. Nonetheless, significant progress has been made recently. This progress has been based upon both theoretical and computational advances, which we discuss. We will discuss, in particular, the results of the ORNL-FAU-NCSU-UCSD collaboration, frame these results in a broader context, and discuss future needs/plans. Recent progress by our group and others has both moved the field forward and illuminated the path forward.