sentences:  Cook surfaced again on the international Speedway front in 2006 where he was indeed a member of the USA squad for the 2006 Speedway World Cup, however he was not required to ride in the actual competition.In October 2006 Cook suffered a serious motocross accident while racing at Washougal Washington in which he hurt his back quite badly and had to have metal rods inserted.The rods were later removed as Cook began to make a recovery but he has had to retire from racing and remains retired in his longtime home of Sacramento, California.