Of course, you don't have to wait until the third Thursday of the month if you have something that you'd like to share with the group. This has probably been on the web for a while but I only just found out about Canon's online museum (www.canon.com/camera-museum).>
I was fascinated to watch a video of how they make lenses (www.canon.com/camera-museum/tech/l_plant) and can understand now why they're so expensive. This site uses Flash Player but the video is also on YouTube (www.youtube.com/watch?v=OkWsk9rXpcU).
I don't understand why they smash the glass into pieces after it's been melted and cooled, but they obviously know what they're doing.