Mariachis, piñatas, tequila shots, ice-cold Coronas and Tecates, margaritas, guacamole, mustaches, ponchos, sombreros, and Taco Tuesdays! These are staples of what the American consciousness thinks about when they think about Cinco de Mayo. But what exactly is Cinco de Mayo about?The club president and vice president of Santa Monica College's M. E. Ch. A. (Movimiento Estudiantil Chican@ de Aztlan) group...