This week ended with the launch of the seventh and final Harry Potter installation. But while the world was consumed with Pottermania, it’s important to remember that there were more serious things going on in the world, too – two of them in -Ist cities. Sampaist was shocked when a passenger jet crashed into the center of Sao Paulo, killing at least 200 people. The airplane, an Airbus A320, skidded off the runway at the…