Around 800 million people follow hundreds of games played every year by teams in the NBA, making it the fourth most popular sporting competition in the world. It's a truly global league, with legions of fans in Brazil, China, Spain, Australia and South Africa. It's not hard to see what attracts them to the sport. For decades, the NBA has enthralled American sports fans. Bill Russell and other early superstars sealed the NBA's place as a national institution...