Brazil Says Gets UN Go-Ahead for Uranium Enrichment &lt;p&gt;&lt;/p&gt;&lt;p&gt; RIO DE JANEIRO, Brazil (Reuters) - Brazil's uraniumenrichment plant in Resende will start working before the endof the year after getting a go-ahead from the United Nations'nuclear watchdog, the country's Science and Technology Ministersaid on Wednesday.&lt;/p&gt;