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Cain tweaks plan to '9-0-9' for poor Americans

DETROIT, Mich. -- Standing in front of the now decrepit Michigan Central Station here on Friday, presidential hopeful Herman Cain introduced new tweaks to his "9-9-9" plan aimed at relieving low-income Americans from some of the tax burdens of his economic strategy.

Cain, the former Godfather's Pizza CEO, unveiled changes to his plan in which impoverished Americans would be exempted from the nine percent individual flat tax that's part of Cain's three-pronged plan.

"If you are at or below the poverty level, your plan isn't '9-9-9,' it's '9-0-9,'" Cain said.

Cain also used his speech in Detroit to introduce his proposal for opportunity zones: low-income areas of the country that would have certain benefits like deregulating the cost of permits for those who want to start a business.

Cain said these plans had been part of 9-9-9 all along, but earlier this week in Las Vegas, he said during campaign stops that he had yet to release the details of how this plan would deal with poor Americans.

"We simply chose not to talk about this piece earlier such that we could get people used to the whole concept," he said.

Video edited by NBC's Matt Loffman.