Susan Sarandon, outspoken actress and liberal political activist, thinks the United States should help build schools in Mexico -- not walls along the border. Visiting a preschool in a slum bordering a vast, municipal garbage dump in Tijuana, Mexico, Sarandon said education was the key to improving lives in Mexico. She criticized a U.S. congressional proposal to extend walls along the 2,000-mile U.S.-Mexico border. The school was founded by New York educator David Lynch, who came to Tijuana in 1980 as a volunteer teacher. He later built the school for the children of Mexicans who eke out a living gathering...