Cinco de Mayo: Cinco de Mayo: What is Everybody Celebrating? (2nd Ed.)Cinco de Mayo has evolved into a holiday so popular that in the United States it draws larger crowds than here in the United States. About half a million people turn out for the annual event in Los Angeles alone, but exactly what is everybody celebrating? They're there for the music and the half priced margaritas but if you ask around, you won't find many people who can tell you what happened in Mexico on that day. There are very few adult level books