http://www.huffingtonpost.com/2012/...id10|htmlws-main-bb|dl4|sec3_lnk1&pLid=161623 One relatively new facet of model flying is First Person Video flying, where you wear vision goggles and can fly a model up to 30+ miles away. Some of these folks are getting up to 11K in altitude too. It is nuts, some of the videos posted in the forums for that sport are both amazing, but also, careless. The prevailing attitude is small airplane big sky, no problem. Some of the insanity can be seen here: http://www.rcgroups.com/forums/showthread.php?t=1351677 Sooner or later there will be a problem. One video showed a guy at 11K feet 60 west of IAD.