Blazars and the emerging AGN/black hole X-ray binary paradigm
  We briefly review the emerging paradigm which links the radio-quiet and radio-loud classes of AGN to the different accretion states observed in stellar mass black hole X-ray binary systems (BHXRBs), and discuss the relevance of the AGN/BHXRB connection to blazar variability. 
P. Uttley (NASA-GSFC)