There are moments when sport steps outside the boundaries of stadiums and assumes an importance way beyond wins, losses and trophies. It can create snapshots in time that illustrate seismic changes in culture. In the United States there are a handful of events that have become iconic: Jackie Robertson running out to play first base for the Brooklyn Dodgers in 1947, finally breaking baseball's colour bar; Tommie Smith and John Carlos raising clenched, gloved fists on the podium after the 200m at the Mexico Olympics in 1968; and Colin Kaepernick kneeling in silent protest during the Star Spangled Banner before NFL games to highlight racial injustice in America.On Wednesday night a stunning sequence of events put sport at the forefront of the culture war that is raging in the US. The Milwaukee Bucks refused to play game five of their Eastern Conference series against the Orlando Magic. This was in response to the shooting of Jacob Blake in Kinosha, Wisconsin on Sunday night. Blake, an African-American, was shot seven times by a police officer and left paralysed. After a summer dominated by Black Lives Matter protests in the wake of the George Floyd's death at the hands of police in...