  We report on the extraction of R=sigam_L/sigma_T from CCFR neutrino and
antineutrino-Iron differential cross sections. R as measured in neutrno
scattering is in agreement with $R$ as measured in muon and electron
scattering. All data on R for Q2 > 1 GeV2 are in agreement with a NNLO QCD
calculation which uses NNLO PDFs and includes target mass effects. We report on
the first measurements of R in the low x and Q2 < 1 GeV2 region (where an
anomalous large rise in R for nuclear targets has been observed by the HERMES
collaboration).
