By Lori Rackl, Tribune News ServiceAfter decades of being lucky enough to travel the world, I’ve collected more than my fair share of souvenirs. My favorite is a small chunk of the Berlin Wall. I didn’t buy it in a museum gift shop or snag it on eBay. I got it straight from the source back in 1989. That’s when the notorious concrete barrier — the ultimate symbol of the Cold War, pitting the communist East against the capitalist West — effectively came crashing down. When the border opened on that game-changer of a day Nov. 9, I happened to...