Alex Morgan is a big unknown for the US heading into the Women's World Cup

Heading into the Women's World Cup, the health of U.S. women's national team forward Alex Morgan has become one of the team's biggest question marks. Morgan hasn't played for the U.S. or her club team, Portland Thorns FC, since suffering a bone bruise in her left knee in early April. What was originally classified as a "minor injury" has forced Morgan to miss the USWNT's past three friendlies. U.S. coach Jill Ellis, however, does not believe the situation is as dire as Morgan's absence suggests....