An exchange took place today at Citigroup's (C) - Get Citigroup Inc. Reportannual shareholder meeting between a tribal woman and the bank's two top executives, Reuters reports.

The situation broke out after Citi conceded to having approved investments in the Dakota Access Pipeline without fully evaluating the Indigenous People's issues involved.

Citigroup is one of 16 banks which have provided project financing for the pipeline.

It stretches across the land of the Standing Rock Sioux whose members are concerned about possible ground water contamination should the pipeline break.

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"We wish we could have a do-over on this," Citigroup Chairman Mike O'Neill said after hearing from Casey Camp-Horinek, a councilwoman for the Ponca Nation. 

"We made the decision that we are a better force for good at the table than away from the table," Citi CEO Mike Corbat added. "We don't think it is the right thing to simply sell these and walk away."

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