Paul Owen, Jonathan Watts
London Guardian 
December 17, 2013
Edward Snowden has offered to help Brazil investigate US spying on its soil in exchange for political asylum, in an open letter from the NSA whistleblower to the Brazilian people  published by the Folha de S Paulo newspaper.
“I’ve expressed my willingness to assist where it’s appropriate and legal, but, unfortunately, the US government has been working hard to limit my ability to do so,” Snowden said in the letter .
“Until a country grants me permanent political asylum, the US government will continue to interfere with my ability to speak out,” he said.
Snowden – currently living in Russia, where he has been granted a year’s asylum until next summer – said he had been impressed by the Brazilian government’s strong criticism of the NSA spy programme targeting internet and telecommunications worldwide, including monitoring the mobile phone of the Brazilian president, Dilma Rousseff.