Bloomberg Businessweek’s Ashlee Vance heads to Finland for a three-part exploration of this traditionally contented country's tech industry. Episode One tackles the critical role Nokia once played in its economy, and the devastating impact Apple's iPhone had on both. Since then, Finland has managed to revive the sector: Instead of the once-ubiquitous Nokia phone, Helsinki's vibrant tech scene is now dominated by companies making mobile games like Angry Birds and Clash of Clans.