Added to the National Film Registry by the Library of Congress in 2019 for having been judged "culturally, aesthetically, or historically important."
Coretta Scott King mentions the workers are being paid $1.30 per hour. This was the federal minimum wage for those jobs in 1969. With inflation, that amount would equate to about $9.10 per hour in 2019.
The "1199" union in this film began in 1932 as an organization of drug store workers in New York City. In the 1950s it expanded into hospitals in the city. In the 1980s, the 1199 union began to break up, with some joining the Service Employees International Union (SEIU) or the American Federation of State, County and Municiple Employees (AFSCME).