The third in a four-part series revealing the deep musical and social impact of Latin music in the USA follows the historic waves of immigration across the often violent borderlands between the USA and Mexico, and reveals the dynamic role that Mexican-American music has played as it accompanied 'the largest migration in the history of the world'. It starts on the streets of east Los Angeles, where 1950s rock legend Ritchie Valens 'crossed the tracks' to inspire other Mexican-American musicians like Los Lobos, Carlos Santana and Linda Ronstadt. But it is in the troubled borderlands, stretching 2,000 miles from Texas to California, that that music has most vividly depicted the myths and legends of an immigrant people who have demanded, and achieved, their place in American society. Featuring Los Lobos, Santana, Linda Ronstadt, Freddie Fender, Selena, Flaco Jimenez and more.