Iranian Armed Forces Chief of Staff Major General Mohammad Bagheri said on Sunday while delivering a speech, that the United States is "the worst negotiating partner," as it broke promises and cannot be trusted.Presenting the details of Iran's Supreme Leader Ayatollah Ali Khamenei's letter to the US regarding nuclear negotiations, Bagheri revealed that Tehran has no intention to start a war but "any blow will be met with the full force of the country." He...