Yesterday was Pi Day and as a proud CMU alum, you'd think I'd remember such an important day. I guess when you don't have a bunch of math nerds to cover your campus with one long continuous string of Pi, it kind of slips your mind. (4/20 is also a big holiday at CMU)P.S. When I googled "CMU pi day", the first hit was for one of my all time favorite TA's, Tom7! The man kept me and Liz from flunking out of our CS classes.