Former New York City Mayor Rudy Giuliani took an unusual approach to commemorate the anniversary of the 9/11 attacks on Wednesday morning — he shared a video clip showing police officers bracing for a riot.

The video begins with a rendition of "America the Beautiful," interspersed with images of police officers standing before angry demonstrators holding up placards denouncing fascism.

"GOD BLESS AMERICA!" Giuliani tweeted.

The ad was taken from an unaired Super Bowl commercial made by a patriotic T-shirt company based in San Antonio called "Grunt Style."

On its Facebook page, the company said they chose not to run it, though its unlikely it would have been allowed to air.

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Former New York City Mayor Rudy Giuliani took an unusual approach to commemorate the anniversary of the 9/11 attacks on Wednesday morning — he shared a clip of an unaired Super Bowl ad showing police officers bracing for a riot.

The commercial begins with a rendition of "America the Beautiful," interspersed with images of police officers standing before angry demonstrators holding up placards denouncing fascism.

The video tracks the journey of one male officer through flashbacks.

Viewers see the man once served in the military, and that he watched firefighters sift through the rubble of the World Trade Center as a child on his TV. It ends with the protesters charging at police and the officer getting his truncheon ready.

The screen fades with the words: "This we'll defend."

"GOD BLESS AMERICA!" Giuliani tweeted with the video.

The clip was taken from an unaired 2018 Super Bowl commercial made by a patriotic clothing company based in San Antonio called "Grunt Style." On its Facebook page, the company said it chose not to run it, though its unlikely the ad would have been allowed to air.

"We weren't denied or rejected by anyone, it was our own decision to not run it. In the end we just couldn't take the big money risk," it read.

Giuliani was New York City's mayor at the time of the 9/11 attacks and his leadership was praised in the immediate aftermath. Now he is President Donald Trump's personal lawyer and his pitbull on cable news, regularly defending his conduct in the White House.

Read more: Rudy Giuliani asked for apologies over Twitter following the submission of Mueller's Russia report with no charges against Trump

House Democrats recently announced they're probing whether Giuliani tried to influence the Ukrainian government to boost Trump's election odds in 2016.