VIENNA --- Iran has given sweeping assurances to the U.N. nuclear watchdog that it will finally assist a long-stalled investigation into uranium particles found at undeclared sites and even re-install removed monitoring equipment, the watchdog said on Saturday. The International Atomic Energy Agency and Iran issued a joint statement on IAEA chief Rafael Grossi's return from a trip to Tehran just two days before a quarterly meeting of the agency's 35-nation Board of Governors. The statement went into little detail but the possibility of a marked improvement in relations between the two is likely to stave off a Western push for another resolution ordering Iran to cooperate, diplo...Keep on reading: Iran makes sweeping pledge of cooperation to IAEA before board meeting