Dr. Gennady Stupakov is a Senior Scientist at SLAC National Accelerator Laboratory in Menlo Park, CA, USA. After graduation from Novosibirsk State University in 1975 with specialization in plasma physics, he worked at Budker Institute of Nuclear Physics in Novosibirsk where he earned his Candidate of Sciences and Doctor of Sciences degrees. At the same time he taught various physics courses at Novosibirsk University where he held a position of professor of physics.In 1991 Dr Stupakov moved to the US to join the Superconducting Super Collider laboratory in Waxahachie, TX, and in 1994 he joined SLAC. His scientific interests cover a broad range of topics in accelerator physics, including collective effects in beam dynamics and theory of free electron lasers. He has more than tree hundred papers published in peer reviewed journals and conference proceedings. He regularly teaches various accelerator physics courses at the US Particle Accelerator Schools. Gregory Penn received his PhD in Physics in 1998 from the Massachusetts Institute of Technology. After a postdoctoral position at the University of California, Berkeley, he was a scientific associate at CERN in 2002-2003. He has been at Lawrence Berkeley National Lab since 2004, first in the Center for Beam Physics and currently in the Accelerator Modeling Program. He has done research on plasmas, accelerator beam physics, free electron lasers, and laser-plasma interactions.