It's very cool when visitors remind you of what you are usually too busy to notice. http://backreaction.blogspot.com/2007/06/frascati.html Amara -- Amara Graps, PhD www.amara.com Associate Research Scientist, Planetary Science Institute (PSI), Tucson INAF Istituto di Fisica dello Spazio Interplanetario (IFSI), Roma, Italia