NEW : Brazil 's foreign minister decries an `` unacceptable violation '' of the country 's sovereignty . The Brazilian government has said it will not allow a U.S. military plane to land in its airspace for fear that it could be used by rebels fighting President Dilma Rousseff and her government. Journalist Glenn Greenwald tells Brazil 's Globo TV about NSA documents . He says one document is on Mexico 's soon-to-be president discussing his Cabinet picks .
NEW : Brazil 's foreign minister decries an `` unacceptable violation '' of the country 's sovereignty . Mexico summons the U.S. ambassador to demand an investigation . Journalist Glenn Greenwald tells Brazil 's Globo TV about NSA documents . He says one document is on Mexico 's soon-to-be president discussing his Cabinet picks .