After discussing the issue with Obama during an economic summit last week in St. Petersburg, Russia, Rousseff asserted that spying on a friendly country is incompatible with democratic alliances. She said Obama had promised answers and told her he didn't want her to cancel her trip.
"I want to know everything that they have. Everything," Rousseff said.
The White House didn't say what specifics, if any, Rice offered Brazil on Wednesday.
But even as the two officials prepared to meet in Washington, new revelations offered further fodder for Brazilian concerns about the surveillance. A report Sunday by Globo TV, based on leaked documents from Snowden, said the NSA targeted Brazil's state-run oil company, Petrobras. It also said the NSA targeted the Belgium-based Society for Worldwide Interbank Financial Telecommunication, an organization that oversees international bank transfers thought to be secure transactions.
The NSA programs have sparked international consternation from Latin America to Asia and Europe.
Mexican President Enrique Pena Nieto, who shared his concerns during his own private meeting with Obama last week, has said reports the NSA had kept tabs on his communications, if true, would constitute an illegal act. And Obama found himself on the defensive last week during a stop in Stockholm, where he insisted the U.S. wasn't targeting the personal communications of average Europeans but acknowledged that the programs haven't always worked as intended and said "we had to tighten them up."
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Follow Josh Lederman on Twitter at http://twitter.com/joshledermanAP