Editor’s Note: Subscribe to "Unlocking the World," CNN Travel’s weekly newsletter. Stay updated on travel trends, aviation news, culinary highlights, and must-visit places around the globe. In this edition, we recount a string of unruly tourist moments from March, but redeem the narrative with heartwarming travel tales and a spark of romance to lift your spirits. Air travel continues to face widespread obstacles due to a blaze near London’s Heathrow Airport. Passengers caught in