different versions?

[Justanotherbiblophile]

I've read that there's been a recent republication, but that it is also a revision.

Obviously, wikipedia sucks for finding out that information - so, what's changed in the revision?

[Carolyn F.]

I'm reading the ebook 2003 version and the World Trade Center was added. I look at the original publication date which is in the 1970s so this had to be updated.