It was open for a decade. And number one is they were building what was called the Berlin Outer Ring. They needed train service to kind of diverge itself around West Berlin, so they couldn't just close the border during that time period. And during that time period there was also kind of the thought that maybe we should let some of these people go if they don't want to be communists. And at the same time we can sneak our communist smiles into the West. So there were some positives of keeping that wall open. But the biggest negative is there's a humongous brain drain.