Documents obtained by teleSUR leaked by whistleblower Edward Snowden reveal that the U.S. National Security Agency extensively spied on PDVSA, the state-owned Venezuelan oil company. The spying was coordinated from within the U.S. Embassy in Caracas and involved intercepting internal PDVSA communications. Among other data, the spy agency was attempting to obtain information about the ongoing case against Exxon Mobil. Isobel Finnbow reports from Caracas. teleSUR