by Chris Taylor Mark Mandel may live in Green Valley, Arizona, about halfway between Tucson and the Mexican border. But in his mind, he’s already strolling the streets of Paris. Like many of us, the semi-retired software engineer has been pretty much stuck at home the last seven months or so, with most nations around the world not even admitting American travelers due to the COVID-19 crisis. But that doesn’t mean Mandel can’t dream — and plan.