On the Cover: Suddenly this year, a handful of teenagers on Instagram began scaling the city’s bridges and skyscrapers and documenting their adventures with terrifying—and thrilling—photographs, offering perspective-altering views of the New York we love. On the cover, a portrait of lower Manhattan taken by Humza Deas in September and posted with the caption“If you believe with absolute honesty that you’re doing everything you can, DO MORE.” Headline lettering by James Victore.