Yankees, Mets get green light from MLB to wear first-responder caps on 9/11 anniversary
Mets, Yankees, New York fans commemorate 20th anniversary of 9/11
Sept. 11 Attack 20th Anniversary: Live Updates: With Bowed Heads, Americans Reflect on 9/11 and Its Aftermath - The New York Times
NFL season opens with Sept. 11 tributes - The San Diego Union-Tribune
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