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 EsperTrump, Pentagon collide over anti-diversity training push Overnight Defense: Stopgap spending measure awaits Senate vote | Trump nominates former Nunes aide for intelligence community watchdog | Trump extends ban on racial discrimination training to contractors, military Overnight Defense: Pentagon redirects pandemic funding to defense contractors | US planning for full Afghanistan withdrawal by May | Anti-Trump GOP group puts ads in military papers 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 John TrumpNew Biden campaign ad jabs at Trump's reported 0 income tax payments Ocasio-Cortez: Trump contributed less in taxes 'than waitresses and undocumented immigrants' Third judge orders Postal Service to halt delivery cuts 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.