Usa "fifth columnist" in una frase

1. More troubling, however, has been the emergence of Fifth Columnists who are using our college campuses, correctional facilities and, sadly to say, military establishments as recruiting (indoctrination) centers for advancing racist and anti-American viewpoints

2. All had been under close observation of the British authorities during the run-up to the Second World War as it was well known that the German Consul in Dar-es-Salaam often came to visit, recruiting fifth columnists, for Adolf Hitler