SLACs new FACET facility had its second user run in AprilJune, 2013. Several new milestones were reached during this run, including the achieve- ment of beam driven plasma wakefield acceleration of a discrete witness bunch for the first time, and energy doubling in a noble gas plasma source. The FACET beam is a 20 GeV electron bunch with a charge of 3.2 nC that can be compressed and focused to a size of 20 {mu}m 20 {mu}m 20 {mu}m rms. To create the two-bunch, drive/witness beam structure, a chirped and over-compressed beam was dispersed horizontally in a chicane and a bite was taken from its middle with a tantalum finger collimator, corresponding to a longitudinal notching of the beam due to the head-tail energy correlation. A new 10 terawatt Ti:Sapphire laser was commissioned and used during this run to pre-ionize the plasma source in order to increase the efficiency of energy transfer from the beam to the wake. Ultimately, a witness beam of hun- dreds of pC in charge was accelerated by a drive beam of similar charge in a pre-formed lithium plasma with a density of 5 10{^16} cm{^-3}, experiencing gradients reaching several GeV/m in magnitude. Show Partial Abstract