Definition: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Input: Media playback is unsupported on your device Media caption Jay Carney: "The President agrees with this decision they made together to postpone the visit" 
  
 Brazilian President Dilma Rousseff has called off a state visit to Washington next month in a row over allegations of US espionage. 
  
 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. 
  
 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. 
  
 Analysis The Brazilian president was caught between the devil and the deep blue sea. Her decision to cancel (or officially, to postpone) the Washington visit will be seized upon by some as an act of petty nationalism. Some Brazilian business leaders, worried by the precarious economic climate, will question the wisdom of antagonising such an important business ally as the US. But the political pressure was greater still. There was fury in Brazil, not only at the revelation that the president's own conversations and communications may have been spied upon by the NSA but that US interests were allegedly involved in blatant economic espionage against major Brazilian interests, including Petrobras. Dilma Rousseff will have been wary of feelings of ordinary Brazilians had her Washington trip gone ahead. The perception here in Brazil is that the Obama administration has yet to give an adequate response or an apology. 
  
 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". 
  
 'Full investigation' 
  
 Ms Rousseff's state visit was to have started on 23 October and would have been the first by a Brazilian president since 1995. 
  
 But in a statement on Tuesday, the Brazilian government said that "given the proximity of the scheduled state visit to Washington - and in the absence of a timely investigation of the incident, with corresponding explanations and the commitment to cease the interception activities" it could not go ahead as planned. 
  
 The statement said Brazil hoped the visit would take place "as soon as possible", once the issue had been "resolved properly". 
  
 White House spokesman Jay Carney said the postponement had been a joint decision between Ms Rousseff and Mr Obama, who agreed it "should not be overshadowed by any bilateral issue". 
  
 The White House said in a statement: "The president has said that he understands and regrets the concerns [that] disclosures of alleged US intelligence activities have generated in Brazil and made clear that he is committed to working together with President Rousseff and her government in diplomatic channels to move beyond this issue as a source of tension in our bilateral relationship." 
  
 Image caption Mr Obama told Mexico's Enrique Pena Nieto he would take personal care of a probe into the allegations 
  
 The BBC's Wyre Davies, in Rio de Janeiro, says the decision to halt the trip will not have been easy as Dilma Rousseff is respected in Washington and was to have been the only world leader afforded the honour of a US state visit this year. 
  
 Turning that opportunity down, he says, will be interpreted in some diplomatic circles as a snub. 
  
 But our correspondent says that by standing up to unacceptable practices she may well have enhanced her own chances of re-election next year. 
  
 Snowden's flight 
  
 The NSA has been accused of looking into electronic communications from what the US sees as hostile Latin American governments, such as Venezuela and Ecuador, as well as traditional allies, including Mexico. 
  
 At the G20 meeting in Russia earlier this month, Mr Obama promised to investigate the allegations of espionage against Ms Rousseff and her Mexican counterpart, Enrique Pena Nieto. 
  
 "What I got from President Obama was a commitment to a full investigation... and if they turn out to be true to impose corresponding sanctions," Mr Pena Nieto told the BBC. 
  
 Edward Snowden, a former NSA contractor, began providing caches of sensitive government documents to media outlets four months ago. 
  
 In June, the 30-year-old fled his home in Hawaii, where he worked at a small NSA installation, to Hong Kong, and subsequently to Russia. 
  
 A US federal court has since filed espionage charges against Mr Snowden and is seeking his extradition. 
  
 Mr Snowden, however, remains in Russia where he has been granted temporary asylum. ||||| U.S. President Barack Obama meets with Brazil President Dilma Rousseff in the Oval Office of the White House in Washington April 9, 2012. 
  
 BRASILIA Brazilian President Dilma Rousseff has called off plans for a state visit to Washington in October because of revelations that the United States spied on her personal communications and those of other Brazilians. 
  
 Rousseff's decision, which came despite a 20-minute telephone call from President Barack Obama on Monday night in an attempt to salvage the trip, is a big blow to relations between the two biggest economies in the Americas. 
  
 Both the White House and Rousseff's office billed the decision as a mutually agreed postponement, and said a state visit could take place at an unspecified later date. However, two officials with knowledge of Rousseff's decision told Reuters that such a visit was unlikely to happen anytime soon. 
  
 White House spokesman Jay Carney said the presidents agreed on the phone the disclosures of alleged U.S. intelligence activities could overshadow their meeting so they decided it would be best to postpone. But U.S. moves to address the surveillance complaints may take months. 
  
 "As the President previously stated, he has directed a broad review of U.S. intelligence posture, but the process will take several months to complete," Carney said. 
  
 Ties between Brazil and the United States had been improving steadily since Rousseff took office in 2011 and before the revelations that the U.S. National Security Agency had snooped on emails, text messages and calls between the president and her aides. The spying revelations came from documents leaked by former NSA contractor Edward Snowden. 
  
 "Illegal surveillance practices intercepting the communication and data of citizens, companies and members of the Brazilian government constitute a serious affront to national sovereignty and individual rights, and are incompatible with democratic cooperation between friendly nations," the Brazilian government said in a statement. 
  
 In the absence of explanations and a "commitment to cease such surveillance activities, the conditions are not in place for the visit to go ahead as previously scheduled," it said. 
  
 U.S. officials said the NSA surveillance was aimed at tracking suspected terrorist activity and did not pry into personal communications, but Rousseff was not convinced. 
  
 The trip was expected to be a platform for deals on oil exploration and biofuels technology, and Brazil's potential purchase of fighter jets from Chicago-based Boeing Co. 
  
 A defense contract worth more than $4 billion that Boeing is seeking for the sale of 36 F-18 fighter jets to the Brazilian Air Force could be the main victim of the spying affair. Brazilian officials have said Brazil cannot buy such strategic aircraft from a country it cannot trust. 
  
 POLITICAL FIRESTORM 
  
 The spying revelations sparked a political uproar in Brazil that Rousseff could not ignore. A senior government official told Reuters that Rousseff's top advisers, including her mentor and predecessor as president, Luiz Inacio Lula da Silva, encouraged her to scrap the state visit. 
  
 The issue is not likely to go away soon in a country that has long harbored suspicions that the United States wants to control its rich mineral resources in the Amazon basin and off its Atlantic coast, where Brazil has made the world's largest oil deep-water discoveries in decades. 
  
 Brazil's Congress has opened an investigation and on Tuesday questioned oil industry regulator Magda Chambriard on whether NSA spying could have given U.S. companies the edge in bidding for offshore production rights to be auctioned next month. 
  
 The committee also wants to send members to Moscow to interview Snowden, who has been granted temporary asylum by Russia. 
  
 The decision to cancel the visit to Washington will add tensions to the U.S.-Brazilian relations and increase risks for U.S. companies operating in sensitive sectors in Brazil, the Eurasia consultancy in Washington said in a note to clients. 
  
 This mainly affects the defense, telecom and energy sectors, and Boeing's chances of securing the jet fighter contract will be "significantly reduced," Eurasia's analysts said. 
  
 "In the energy sector, there will certainly be a political firestorm if an American company wins the (subsalt) bid round in October," Eurasia said, referring to the deep sea oil deposits that sit beneath a thick layer of salt under the ocean floor. 
  
 (Additional reporting by Brian Winter in Sao Paulo and Roberta Rampton in Washington; Editing by Kieran Murray and David Brunnstrom) |||||
Output:
Brazil has just exacted a bit of diplomatic revenge over the news that the NSA was reading the emails of President Dilma Rousseff, other Brazilians, and the state oil company Petrobras. President Dilma Rousseff has made the rare decision to scrap a state visit to Washington planned for next month, reports the Wall Street Journal. What's more, her move came after a personal phone call from President Obama yesterday. Both countries are portraying the decision as mutual in order to give the US time to investigate the NSA eavesdropping revelation made public by Edward Snowden. But Reuters sees it as a "big blow to relations between the two biggest economies in the Americas." And the BBC explains that Rousseff was under tremendous political pressure back home given the depth of anger at the US spying. By calling off the trip, she might taken a big step toward re-election next year, writes Wyre Davies.