Brazilian President calls off US trip

The US National Security Agency (NSA) has been accused of intercepting emails and messages from Ms Rousseff, her aides and state oil company, Petrobras.
The allegations were based on documents leaked by fugitive former intelligence contractor Edward Snowden.
President Barack Obama had promised to investigate the incident, Kazinform has learnt from BBC News.
The White House said he had telephoned Ms Rousseff on Monday to discuss the matter.
The allegations of widespread espionage against Brazilian citizens were first published in July by Rio de Janeiro-based journalist Glenn Greenwald, a reporter for the British Guardian newspaper.
Mr Greenwald alleged that the NSA accessed all internet content that Ms Rousseff had visited online.
The documents, according to the report, were part of an NSA case study showing how data could be intelligently filtered.
Earlier this month, another report by Mr Greenwald on Globo Television alleged that the NSA had illegally accessed data from Petrobras.
The company is due next month to carry out an important auction for exploration rights of an oil field off the Rio de Janeiro state coast.
Ms Rousseff has said that if the accusations are proven it means the NSA was involved in "industrial espionage".
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