Calls follow announcement by Iran that it intends to step up its enrichment of uranium

US defense secretary, French defense minister agree on need for sanctions after months of diplomatic overtures from the West

Decision prompting speculation announcement may have more to do with negotiations with West than imminent enrichment

Many workers have lost their jobs, and employers are trying to get their businesses up and running

Earlier, UN said it is racing against time to provide survivors with tents before rainy season starts