Security expert says critical time is slipping away for US missionary in Niger Bryan Stern of Grey Bull Rescue warned that critical time is slipping away for efforts to recover an American missionary who was kidnapped in Niger. NEW You can now listen to Fox News articles! FIRST ON FOX: U.S. troops trying to combat al Qaeda and ISIS jihadist fighters in Niger and some other West African countries in the terror-ridden Sahel region are reportedly ‘completely blind’, following what a former senior