  The Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope
provides both direct and indirect measurements of Galactic cosmic rays (CR).
The LAT high-statistics observations of the 7 GeV - 1 TeV electron plus
positron spectrum and limits on spatial anisotropy constrain models for this
cosmic-ray component. On a Galactic scale, the LAT observations indicate that
cosmic- ray sources may be more plentiful in the outer Galaxy than expected or
that the scale height of the cosmic-ray diffusive halo is larger than
conventional models. Production of cosmic rays in supernova remnants (SNR) is
supported by the LAT gamma-ray studies of several of these, both young SNR and
those interacting with molecular clouds.
