Grammatical question

[Frodo]

Have the rules changed?  I was taught in grade school that when you're indicating a possession on a noun that already happens to end with an 's', you only have to affix an apostrophe, like so:

e.g. 1:

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So as to avoid unnecessary repetition.  

Yet it seems journalists are putting in an extra 's':

e.g. 2:

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Am I wrong?