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A long-standing problem is the apparent
lack of longitudinal strength in complex nuclei as summarized by the
failure to fulfill the Coulomb Sum Rule (CSR). Possible explanations have
included correlations and modifications of nucleon structure in the
medium. This situation is far from clear, however: recent analyses have
yielded results in which the CSR is essentially saturated. [Ya93] As
the role of correlations is expected to diminish with 
, it is
essential to extend measurements of the CSR beyond the few hundred MeV/c
momentum transfers characteristic of MIT/Bates and Saclay. A measurement
on 
Fe at 1 GeV/c was performed at SLAC [Ch91] and determined
that the quenching of 
observed at lower momentum transfers persists.
This is in contrast to the A=3,4 systems where the saturation of the CSR
inferred at lower momentum transfers is confirmed by newer SLAC 
separations at 1 GeV/c. [Me92] Understanding the inclusive
electromagnetic response of complex nuclei remains a challenge.