  In this talk I review theoretical motivations for possible CPT Violation and
deviations from ordinary quantum mechanical behavior of field theoretic systems
in some quantum gravity models, and I describe the relevant precision tests
using neutral and charged Kaons. I emphasize the possibly unique role of
neutral-meson factories in providing specific tests of models in which the CPT
operator is not well-defined, leading to modifications of
Einstein-Podolsky-Rosen (EPR) particle correlators.
