  Jet quenching in the hot and dense medium created in ultra-relativistic heavy
ion collisions is a well-established experimental phenomenon at RHIC. It has
long been anticipated that the LHC heavy ion program would substantially
advance the study of jet quenching by providing access to highly energetic jets
and by measuring fully-reconstructed jets. Immediately following turn-on of the
LHC with lead beams, in November 2010, that expectation was fulfilled through
the observation of large di-jet asymmetries that may indicate substantial jet
quenching. We will present recent results from ATLAS aimed to provide further
understanding of this phenomenon. Measurements of single jet production and jet
fragmentation in Pb+Pb collisions at $\sqrt{s_{NN}} = 2.76$ TeV will be
presented.
