 Complete the following phrase:  In October 1961, the final remaining brick sections of the track were paved over with asphalt, with the exception of a distinct three-foot-wide line of bricks at the start-finish line. The Brickyard thus became known for its Yard of Bricks. After being widely ignored by Formula One drivers when it was an F1 World Championship event, a wave of F1 drivers went to the speedway in the 1960s, and the rear-engine revolution that was started by the Cooper F1 team changed the face of the 500 as well, with and world drivers champion Jack Brabham of Australia qualifying his Cooper in 13th for the 