His arrival in Argentina is recorded in the CEMLA database; Antonio Guaragna, 34 years old, arrived in Buenos Aires on 21 November 1887 on the ship "La France" from the port of Naples. But the situation in Argentina was worse than in Italy, and he decided to move to New York, where he opened a business in Brooklyn, and asked his wife Rachele De Luca and children to join him. In Brooklyn, on December 22, 1893, another son was born, Salvatore Antonio, alias Harry Warren, who was to become one of the most celebrated composers of American theater and cinema, the winner of three Oscars.
Tuti (as young Salvatore was called), grew up in his family's musical passion: "Our family could be said to be a musical family only in the sense that we loved music and sang together, but there was no piano, which gave me pain, because I wanted to play." In the 1900 census his father, Anthony Warren, is recorded as a shoemaker, as well as the eldest brother Frank, sisters Josephine and Mamie work as tailoresses, Annie is at school, Charles and Harry are just children. In the 1910 census the family are still in Brooklyn Ward 25, Kings, New York, the father is the proprietor of a shoeshop.
Already in 1900 the family surname had been changed to Warren, as happened for many Italians because of the climate of xenophobia of the 1890's: in fact, only three years after Salvatore's birth, on August 3, 1896, in Hahneville, New Orleans, the crowd had dragged out of prison three Italians accused of murder, and lynched them without waiting for the trial. On 22 August of the same year a hunt for Italians began in Brazil as well. On July 21, 1899 in Tallulah, in Madison County, Louisiana, five Italian workers, who had quarreled with an American citizen, were lynched by the crowd and left dead on the road.