High Energy Astrophysics and Gamma-Ray Bursts in the Fermi Era

With the launch of the Fermi gamma ray space telescope, high-energy astrophysics has entered a new era. Exciting new results on Galactic and extragalactic sources are leading to a better understanding of the physics and astrophysics of these objects. I will discuss results from the Fermi gamma ray space telescope on the extragalactic background light (EBL) and gamma-ray bursts (GRBs).