2000 – Up until May 1, all GPS signals were scrambled for protection. President Bill Clinton announced they would be turning off the Selective Availability (SA) because it didn’t propose a greater threat. But it also gave geeks something new to play with. But what to do? Dave Ulmer ultimately started the GeoCaching phenomenon. He hid a bunch of trinkets out in the woods of Portland, Oregon. He then went to the USENET group sci.geo.satellite-nav and stated “If you take something, leave something”. The Usenet message: From: Dave ([email protected]) Subject: The Great American GPS Stash Hunt! Newsgroups: sci.geo.satellite-nav Date: 2000/05/03 — The...