`  == My recent revrt/un-revert ==  I'd like to publicly apologize for my recent reversion/unreversion of this article. The Wiki watchlist showed me a detrimental difference that was not, apparently, really there; I reverted this difference, but then I went back to check the history to see which was the ``truest`` version to revert to. Whereupon I discovered that I was apparently mislead in the first place, so I unreverted my reversion. But if someone really knows the opening date of the Expo, could you check out the article, please?   `