  We introduce a cluster DMFT (Dynamical Mean Field Theory) approach to study
the normal state of the iron pnictides and chalcogenides. In the regime of
moderate mass renormalizations, the self-energy is very local, justifying the
success of single site DMFT for these materials and for other Hunds metals. We
solve the corresponding impurity model with CTQMC (Continuous Time Quantum
Monte-Carlo) and find that the minus sign problem is not severe in regimes of
moderate mass renormalization.
