My grandson (age 10) and I are listening to Jethro Tull's Thick As A Brick on the phonograph, which he choose. I told him about the police teargassing the crowd at the Red Rocks Amphitheater Jethro Tull concert in the foot hills outside Denver in 1971. I don't think he understands what I'm talking about. But he's grooving to the music. It makes me want to cry.