Catholic Church engaged in other efforts specifically targeted at braceros. Labor unions that tried to organize agricultural workers after World War II targeted the Bracero Program as a key impediment to improving the wages of domestic farm workers. These unions included the National Farm Laborers Union (NFLU), later called the National Agricultural Workers Union (NAWU), headed by Ernesto Galarza, and the Agricultural Workers Organizing Committee (AWOC), AFL-CIO. During his tenure with the Community Service Organization, César Chávez received a grant from the AWOC to organize in Oxnard, California, which culminated in a protest of domestic U.S. agricultural workers of the U.S. Department of Labor's administration of the program. In January 1961, in an effort to publicize the effects of bracero labor on labor standards, the AWOC led a strike of lettuce workers at 18 farms in the Imperial Valley, an agricultural region on the California-Mexico border and a major destination for braceros. Prior to the end of the Bracero Program in 1964, The Chualar Bus Crash in Salinas, California made headlines illustrating just how harsh braceros situations were in California. In the accident 31 braceros lost their lives in a collision with a train and a bracero transportation truck. This particular accident led activist groups from agriculture and the cities to come together and strongly oppose the Bracero Program. As a result, it was followed by the rise to prominence of the United Farm Workers and the subsequent transformation of American migrant labor under the leadership of César Chávez, Gilbert Padilla, and Dolores Huerta. According to Manuel Garcia y Griego, a political scientist and author of The Importation of Mexican Contract Laborers to the United States 1942–1964, the Contract-Labor Program "left an important legacy for the economies, migration patterns, and politics of the United States and Mexico". Griego's article discusses the bargaining position of both countries, arguing that the Mexican government lost all real bargaining-power after 1950. In addition to the surge of activism in American migrant labor the Chicano Movement was now in the forefront creating a united image on behalf of the fight against the Bracero Program. The end of the Bracero Program in 1964 was followed by the rise to prominence of the United Farm Workers and the subsequent transformation of American migrant labor under the leadership of César Chávez, Gilbert Padilla, and Dolores Huerta. According to Manuel Garcia y Griego, a political scientist and author of