Puerto Rico is currently an unincorporated territory of the U.S. There is much debate over the future of Puerto Rico, usually focusing on three major choices; statehood, independence, or remaining a U.S. territory. Since 1917, its people have been U.S. citizens, and their movement throughout the states is therefore officially termed internal migration. However, the transition made by Puerto Ricans who move to the continental U.S. can involve the same changes and challenges that most immigrants experience. The 1940s and 50s brought many Puerto Ricans to the East Side of Buffalo, where they found work in the steel mills and war production industries. In the 1950s, Puerto Rican migrants began to move to the West Side, and by the 1960s, the Lower West Side had become the heart of the Puerto Rican community, which it remains today.