It's the fifth of May, or Cinco de Mayo, and although it is not an official holiday in Mexico, it is barely recognized there, that doesn't stop Mexicans living north of the Rio Grande from making it their biggest cultural celebration of the year. There are about 20 million Mexicans and Americans with Mexican heritage now living in the U.S. Throw in the thousands of honorary Mexicans who just happen to like tequila, tortillas and mariachis and you've got a party in some neighborhoods that rivals St. Patrick's Day's.
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