U.S. President Barack Obama speaks at the screening of "Cesar Chavez: an American hero"

President Obama hosts a screening of "Cesar Chavez: An American Hero." President Obama tells of labor leader Cesar Chavez's commitment to hard work and of how he thinks that more hard work needs to be done, prior to a screening of a film celebrating the life of Chavez, founder of the United Farm Workers union. Held in the White House.