We’ve been manufacturing large aperture diffractive optics since the early 90s, beginning with gratings for the Nova Petawatt laser. At that time, there was no source for making larger than about 16-inch-diameter gratings anywhere in the world. Once we demonstrated the Nova Petawatt, every big institution wanted to have one. So, we went into the Work for Others business, as LLNL was the only source for a long time. It was almost like a small business, and we operated as an independent contractor. It was very appropriate for a national laboratory to do this kind of work as it involved a big investment for a small annual return, it required specialized and expensive equipment, and it served the national interest