Frederik Pohl and Ray Bradbury met for the first time at the 1939 Worldcon when they were both teenagers. The last time they saw each other was at the 2008 Eaton Conference, as Pohl wrote in his Bradbury obituary —
I saw Ray last a couple of years ago, when he and I were joint guests for the science-fiction program at UC-Riverside. He was feisty as ever, rather startlingly denouncing current science fiction as trash or worse — though it turned out that what he meant to be denouncing wasn’t print science fiction, but only the current crop of sf films. I would have liked to go into that in more detail, and to ask if he included the film Avatar. But time didn’t permit, and now I never can.
[Thanks to John King Tarpinian for the story.]