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In page Beaver Stadium:

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The "S-Zone" within the student section is another tradition at Beaver Stadium.[1][2] A small section behind the end zone are all given white and blue shirts supplied by the Pennsylvania State University Lion Ambassadors to create an "S" in the student section. The "S-zone" was moved from the 20 yard line to its current location at the beginning of the 2011 football season, as the student section was shifted over to between the 10 yard lines. For the 2008, 2011, 2013, and 2018 Homecoming Games, the "S-zone" was black and pink, in honor of the original Penn State colors. On April 21, 2007, for the Annual Blue and White Game (Spring Scrimmage), the "S" zone was converted to a "VT" zone, in honor of the victims of the massacre that took place on April 16, 2007, at Virginia Tech.