What happens with an underground nuclear test? What happens with an underground nuclear test? What happens with an underground nuclear test? What happens with an underground nuclear test? What happens with an underground nuclear test? What happens with an underground nuclear test? What happens with an underground nuclear test? What happens with an underground nuclear test? What happens with an underground nuclear test? What happens with an underground nuclear test? Underground nuclear tests What happens with an underground nuclear test? What happens with an underground nuclear test?