Sixty years ago, on May 10, 1940, Germany invaded Belgium, France, Luxembourg and the Netherlands. My mother, who was just shy of six years old, traveled with her parents and older brother and sister from Antwerp to the coastal port of Ostend, hoping to get a boat to England. Alas, the Nazis were faster. She and her family had to walk back from the coast, dodging bombardments along the way. Less than three weeks later, Belgium capitulated. She and her family went into hiding, sheltered by the resistance throughout the war. Speaking to my mother by Skype this afternoon as I sat in a hotel room in Zurich, three days into my own odyssey being stranded in Europe by the Icelandic...