Barely a decade into the 21st century, the world often feels like an uncertain place. Look at any news headline from just about any continent, and the old notions of security, economic and political stability and cultural harmony all seem to be up for grabs. In Ireland and the surrounding Celtic countries, the outlook is no different, according to Matthew Gilsenan, founding vocalist for the Celtic Tenors, the three-man vocal group that also includes James Nelson and Daryl Simpson. The trio has been weaving together an eclectic repertoire of Celtic, operatic and popular songs for audiences worldwide since 2000. While some of the culture clashes of decades past may have been smoothed over in recent years,