Former President George W. Bush on Wednesday laid a wreath on the 9/11 memorial at the Pentagon.

Bush, who was president during the attacks, placed the wreath at the site where Flight 77 hit the Pentagon, killing 184 people. 

The former president was joined by Defense Secretary Mark EsperMark EsperFemale generals' promotions held back over fears of Trump's response: report Overnight Defense: Army details new hair and grooming standards | DC National Guard chief says Pentagon restricted his authority before riot | Colorado calls on Biden not to move Space Command New Army hair and grooming standards allow for ponytails, buzz cuts and earrings MORE and former Defense Secretary Donald Rumsfeld as taps was played. Bush then shook hands and talked with family members and first responders.

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"Terrorist attacks can shake the foundations of our biggest buildings, but they cannot touch the foundation of America," Bush said in a post on Facebook.

Earlier on Wednesday President TrumpDonald TrumpSenators given no timeline on removal of National Guard, Capitol fence Democratic fury with GOP explodes in House Georgia secretary of state withholds support for 'reactionary' GOP voting bills MORE commemorated the 18th anniversary of the 9/11 attacks that killed thousands of people and cautioned the Taliban.

“If for any reason they come back to our country, we will go wherever they are and use power the likes of which the United States has never used before — and I’m not talking about nuclear power — they will never have seen anything like what will happen to them,” Trump said.