The SKA Challenge.- The SKA new Instrumentation; Aperture Arrays.- AGN, Star Formation, and the nanoJy Sky.- Using HI absorption to trace outflows from galaxies and feeding of AGN.- Galaxy Dynamics.- Transient Phenomena: Opportunities for New Discoveries.- Cosmic Magnetism: Current Status and Outlook to the SKA.- The SKA and "High-Resolution" Science.- Precision Astrometry: from VLBI to Gaia and SKA.- Ultra Steep Spectrum radio sources in the Lockman...