Chino is a big one for WWII aircraft. It's the biggest one I attend here out west. In the past few years they have thrown together some great stuff. 2007, THREE P-38s in formation, TWO REAL zeros in formation. 2006: P-26, P-35, P-51, F-86 in formation!, P-51A in formation with a Zero and so much more. I think it was 2005 they had 4 P-47s in formation!
Every year, it's something amazing and more. If you haven't been to a Chino show, I highly recommend it. Just be prepared to have a sore neck at the end of the day from watching airplanes zoom by. If you have a heavy lens, your arms will feel like lead. But it is worth it.