Sue Paterno recounted the story behind why members of the Army ROTC guard the Lion Shrine on the eve of the Homecoming football game each year.
The win over the Hawkeyes extended the Nittany Lions' nine-game winning streak and a perfect Big Ten record.
The Nittany Lions outshot Clarkson 81-48.
A 73rd minute go-ahead goal from captain Peter Mangione was the difference as the Nittany Lions gave Northwestern its first loss.
Sophia Gladieux scored two goals for her fourth multi-goal game of the season.
