In this talk I investigate the
"firewall argument", that claims that black hole horizons can
not be smooth.

Using
a holographic model of the black hole horizon as a quantum mechanical
membrane, I  show how 

to
recover the black hole interior as an emergent
smooth region of space-time. The reconstruction makes 

use
of the formalism of quantum error correcting codes. I explain
why the horizon of very old black holes 

appears
to be singular, and formulate a complementarity principle that resolves
this firewall paradox.