“HE COULDN’T HOLD IT IN ANYMORE…” Keith Harkin’s final moments on stage with Celtic Thunder didn’t feel like a performance—they felt like a goodbye he was trying, and failing, to hold together. As he began Tears of Hercules, his voice carried a quiet strength… but beneath it, the emotion was impossible to hide. Each lyric landed heavier than the last, his eyes glistening, his voice trembling just enough to make the entire room feel it. “I didn’t think this would be so hard to say out loud…” he c