Interstellar gamma rays and cosmic rays: new insights from Fermi-LAT AND   INTEGRAL
  In over two years of operation Fermi-LAT has revolutionized our knowledge of the gamma-ray sky. Interstellar gamma rays are part of this new era and allow unprecedented tests for models of cosmic rays in the Galaxy. The extension to lower energies with INTEGRAL/SPI data is also evolving. The global multiwavelength luminosity of the Milky Way has been derived, with implications for the Galactic energy balance and the radio-FIR correlation. 
A. W. Strong (on behalf of the Fermi-LAT Collaboration)
astro-ph.HE