  We describe the experience of an observer falling into a black hole using the
AdS/CFT correspondence. In order to do this, we reconstruct the local bulk
operators measured by the observer along his trajectory outside the black hole.
We then extend our construction beyond the black hole horizon. We show that
this is possible because of an effective doubling of the observables in the
boundary theory, when it is in a pure state that is close to the thermal state.
Our construction allows us to rephrase questions about information-loss and the
structure of the metric at the horizon in terms of more familiar CFT
correlators. It suggests that to precisely identify black-hole microstates, the
observer would need to conduct measurements to an accuracy of e^{-S_{BH}}. This
appears to be inconsistent with the fuzzball proposal, and other recent
proposals in which pure states in the ensemble of the black hole are
represented by macroscopically distinct geometries. Furthermore, our
description of the black hole interior in terms of CFT operators provides a
natural realization of black hole complementarity and a method of preserving
unitarity without firewalls.
