  We discuss the potential for the detection of dark matter and the
characterization of its particle nature via the observation of dark matter
subhalos. Specifically, we discuss the search for dark matter Galactic subhalos
in the gamma-ray band with the Large Area Telescope on-board the Fermi
gamma-ray Space Telescope, and the future generation of imaging atmospheric
Cherenkov telescopes, best represented by the planned Cherenkov Telescope
Array.

High Energy Astrophysical Phenomena