  The muon has played a central role in establishing the Standard Model of
particle physics, and continues to provide valuable information about the
nature of new physics. A new complex at Fermilab, the Advanced Muon Facility,
would provide the world's most intense positive and negative muon beams by
exploiting the full potential of PIP-II and the Booster upgrade. This facility
would enable a broad muon physics program, including studies of charged lepton
flavor violation, muonium-antimuonium transitions, a storage ring muon EDM
experiment, and muon spin rotation experiments. This document describes a
staged realization of this complex, together with a series of next-generation
experiments to search for charged lepton flavor violation.
