Mets, Yankees to remember 9/11 20 years later
Yankees and Mets Clash in Subway Series on 9/11 Anniversary - The New York Times
Yankees vs. Mets Game Highlights (9/11/21)
NY Yankees, Mets unite on 20th anniversary of 9/11
Yankees and Mets Clash in Subway Series on 9/11 Anniversary - The New York Times
Mets-Yankees hold 9/11 ceremony honoring first responders
After 13 years, Howie Rose still trying to put Piazza's post-9/11 homer in perspective – New York Daily News
Mets, Yankees offer emotional tributes 20 years after 9/11 in Subway Series
Yankees-Mets 9/11 ceremony to feature Joe Torre, Bobby Valentine, Mike Piazza; Giants, Jets to honor 20th anniversary of terrorist attacks