William Lee, Coordinator of Scientific Research, National Autonomous University of Mexico (UNAM). William Lee obtained his Ph.D. In Physics from The University of Wisconsin, Madison, USA. In 1998 he was recruited as researcher at the Institute of Astronomy of UNAM, where he also served as Director. He has recently been appointed as Vice-Rector of Scientific Research of UNAM by the current Rector Dr Enrique Graue Wiechers. His research has centered on compact objects of the universe, hydrodynamics and astrophysics of high energies. He has made important contributions to the understanding of cosmologic gamma rays.