  In these proceedings for CIPANP2015 we present a brief overview of the
current status of the theoretical approaches used by our group for the
extraction of $|V_{cb}|$ and $|V_{ub}|$ through inclusive semi-leptonic $B$
decays. We discuss the calculations and implications of the recent perturbative
corrections to power-suppressed contributions for $|V_{cb}|$, and present an
overview of the major sources of theoretical uncertainty for $|V_{ub}|$.
