They were in charge of finding communist spies or basically anyone that was communist
They don't use them because they are not economically sustainable for countries. Uranium is pretty cheap for countries and new technologies enabled the people to cheaply enrich it and use it so using breeder reactors got shunned away because of economic sustainability. The regular nuclear reactors are much more cheap than breeder reactors.
The separate but equal principle was made to say that whites and African Americans was desperate but it was not equal. This meant that theycould remain separated as long as they had equal accommodations. But these were not always equal. White bathrooms were much nicer than African American bathrooms. White restaurants were a lot nicer than African American restaurants.
Answer:
Los igneri se caracterizan por su cerámica avanzada y su arte en la fabricación de canoas. También trajeron la horticultura a las Antillas.