“The Fermi National Accelerator Lab has been sending a beam of neutrinos to the Soudan Lab since the first one was detected on March 20, 2005,” they say in the invitation. “It will also be an opportunity to ask the experts about the new project, NOvA, a 15 kiloton detector under construction on the Ash River Trail to study other characteristics of the neutrino.”
The lab is at the Soudan Underground Mine State Park near Tower. Free tours start at 8:30 a.m. and run every 15 minutes until the last tour at 3:45 pm.
I really wish I could go. It would have been a neat place to visit. Maybe I'll talk to the people around here who do work in that lab and see if I can get my own guided tour one of these days.