San Antonio Spurs coach Gregg Popovich was named assistant coach for the USA team under head coach George Karl of the Milwaukee Bucks, according to Johnny Ludden of the San Antonio Express News.  Stanford's Mike Montgomery and Oklahoma's Kelvin Sampson will also be assistant coaches.  He will help coach the team when it competes in the 2002 FIBA World Basketball Championships this summer.  The selection also puts him up for consideration to help with the 2004 Olympic squad.