From Walt "Clyde" Frazier to Russell Westbrook, a new book by Pulitzer Prize winner Mitchell S. Jackson chronicles the relationship between style and basketball over decades. Fly: The Big Book of Basketball Fashion features photos and analysis of how the Civil Rights movement, the infamous dress code, and Instagram have all played a role in the evolution of NBA players' modes of expression. In today's episode, Jackson tells NPR's Ayesha Rascoe how race and activism also intersect with the perception of the sport, and why he thinks we're seeing the most exciting tunnel walks yet.