Abstract: I will review recent GRB observational results from The Fermi and Swift satellite, as well recent IceCube limits, and will discuss current theoretical GRB models and how they compare to these observations and constraints.

 Biog: Peter is the director of the Center for Particle and Gravitational Astrophysics at Pennsylvania State University, where he also holds the Eberly Chair of Astronomy & Astrophysics. He has won numerous awards and is a fellow of the American Academy of Arts and Sciences.