My first job out of college was maintaining the software library for the DZero collaboration, one of two such groups directly observing what happens when you slam Tevatron strength beams into each other. Hundreds of physicists at scores of universities in 18 countries around the world, and my job was to make sure they all had the same software on their computers. Between D0 and CDF, we discovered a bunch of predicted particles, including the top quark. We brought physicists from as far away as Latin America, Russia, and China to the US to do physics -- during the cold war. The cryogenics, superconducting wire and magnet industries had to expand to meet our needs, creating hundreds if not thousands of skilled-labor jobs across America. Hundreds of world class (if I do say so myself) engineers, computer experts, physicists, and technicans now working in the private sector got our start on the TevaTron.
Today is it's last run, because certain people in government have rather poor fiscal priorities.
Hail and farewell.