Richard I. Epstein is a Laboratory Fellow at Los Alamos National Laboratory (LANL) in New Mexico. He was an undergraduate in Engineering Physics at Cornell University and received his Ph.D. in Applied Physics from Stanford University. He then did research at the University of Texas at Austin, Harvard University and Nordita in Copenhagen, before taking his present position. He has published over 150 papers in theoretical astrophysics, satellite instrumentation and applied physics. He leads the effort in laser cooling of solids at LANL. He is a fellow of Optical Society of America. Mansoor Sheik-Bahae is a professor of Physics and Astronomy and the chair of Optical Science and Engineering at the University of New Mexico (UNM), Albuquerque NM (USA). He graduated from the State University of New York (Buffalo), and subsequently spent 7 years as a research scientist at CREOL-University of Central Florida before joining UNM in 1994 where he currently heads the Consortium for Laser Cooling of Solids. Professor Sheik-Bahae has authored more than 200 scientific papers in nonlinear optics, ultrafast phenomena and solid-state laser cooling, with more than 4000 citations to his work. He is a fellow of Optical Society of America.