Injury Casts Doubt on Alex Morgan's World Cup

You know Alex Morgan from the magazine covers and highlight reels. She's the charismatic U.S. striker known by fans as "Baby Horse" for the way she seems to gallop toward the goal.
Morgan has been plagued by injuries in the past year. An ankle sprain kept her from the World Cup qualifying matches last fall, and a left knee bruise has sidelined her in recent weeks. As a precaution, she missed the team's last three friendly games prior to the World Cup.