"Warm absorbers" and "-mirrors": one and the same gas?
  We review the main properties of "warm mirrors" in obscured AGN, and discuss whether the scattering gas could be also responsible for "warm absorbers" commonly observed in unobscured AGN. 
Matteo Guainazzi (1), Stefano Bianchi (2,1) ((1) European Space   Astronomy Center of ESA; (2) Universita' di Roma Tre)