CNN spoke with the uncle of the Nicaraguan boy found alone on the southern US border. In Miami, an uncle of the Nicaraguan boy who was found on the southern border of the United States walking alone told CNN that he spoke permanently with his sister during the journey that began on February 7 with her nephew. He said that they were both kidnapped in Mexico, that he paid a ransom for the child and that from that moment on he lost contact with his sister. CNN has not been able to corroborate exactly what happened in the case. Lázaro...