Thought some of you GIS people might like this. http://www.ted.com/talks/todd_humphreys_how_to_fool_a_gps.html I was unaware of the significance of May 2000. Jim -- datalude: information security e: jim at datalude.com Philippines: +63 2 403 1311 / mob: +63 917 849 3939 Hong Kong: +852 6489 4132 w: http://www.datalude.com/