George W. Bush and Laura Bush marked the 20th anniversary of the Sept. 11, 2001, terrorist attacks that defined his presidency — and the country for years after — with an appearance Saturday at the United Flight 93 memorial site in Shanksville, Pennsylvania.

The 75-year-old former president gave a keynote speech marking the occasion.

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“Maligned forces seem at work in our common life that turns every disagreement into an argument and every argument into a clash of cultures,” he said. “So much of our politics has become a naked appeal to anger, fear and resentment. That leaves us worried about our nation and our future together.”

“There is little cultural overlap between violent extremists abroad and violent extremists at home,” Bush added, citing the “disregard for human life and determination to defile national symbols” exhibited by domestic extremists.

“They are children of the same foul spirit and it’s our continuing duty to confront them,” he shared while appearing to reference the Jan. 6 insurrection at the Capitol.

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