BlankThere is a program on NPR called Invisible that talks about a blind person using echo location by making a clicking noise. I don't know when it is on your local stations; but it is on WUOM-91.7 tonight at 8:00 EST January 26. It can be heard on their website as well, michiganradio.org. If you think education is difficult, try being stupid ! Steve Lansing, MI