Liquid Argon Time Projection Chamber (LArTPC) imaging detectors provide an impressive capability to reconstruct neutrino interactions. After a successful three-year physics run at the underground LNGS - INFN laboratory, ICARUS was refurbished and subsequently moved to Fermilab to begin operating as the far detector in the Short-Baseline Neutrino (SBN) Program. ICARUS has entered the physics data taking phase and is presently collecting large statistical samples for its proposed physics analysis program. First studies have been performed with a well defined sample of $\nu_{\mu}$CC quasi elastic interactions, showing promising and robust results of fully reconstructed neutrino events. A brief review of ICARUS' initial operations and its current activities are reported here.