MOTOR-INDY-INDY500/QUALIFYING-BOURDAIS:Motor racing-Bourdais has successful surgery after crash at Indy

BASKETBALL-NBA-BOS/THOMAS:NBA-Celtics' Thomas out for rest of playoffs with hip injury

ATHLETICS-DIAMOND-DOHA-HARRISON:Hurdler Harrison breaks hand, still wins race

OLYMPICS-SWIMMING-KIEFER:Olympics - Oldest U.S. gold medallist Kiefer dies at 98

ICEHOCKEY-NHL-PIT/CROSBY:NHL-Crosby practices with Penguins, return uncertain

GOLF-PGA-JOHNSON-DAY:Golf - Johnson replaces Day as world number one with LA win

GOLF-PGA/ (PIX):Golf-Johnson claims world number one ranking with Riviera win

ICEHOCKEY-NHL-HIGHLIGHTS/:NHL-Highlights of Sunday's National Hockey League games

GOLF-PGA/:Golf-Johnson jumps clear at Riviera, closes in on world number one

TENNIS-MEN-ARGENTINA:Nishikori battles through to Argentina final

TENNIS-MEN/ARGENTINA:Tennis-Nishikori battles through to Argentina final

ATHLETICS-STEPANOVA/ (PIX):Athletics-Russian whistleblower Stepanova makes slow return

ATHLETICS-STEPANOVA:Russian whistleblower Stepanova to race in Boston

ATHLETICS-STEPANOVA/ (UPDATE 1):UPDATE 1-Athletics-Russian whistleblower Stepanova to race in Boston

ATHLETICS-STEPANOVA:Russian whistleblower Stepanova to race Saturday in Boston

ATHLETICS-STEPANOVA/:Athletics-Russian whistleblower Stepanova to race Saturday in Boston

Sherif said researchers might one day insert this gene into GM crops to prevent their pollen from reaching other plants.