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I have the following rule in my .htaccess file:

# 1 Month for most static assets
<filesMatch ".(css|jpg|jpeg|png|gif|js|ico|woff)$">
Header set Cache-Control "max-age=2592000, public"
</filesMatch>

And I have but when I check my page on Google page insights I still see that one .js file has not been cached , the file the following file:

http://www.google-analytics.com/analytics.js (2 hours)

Now how exactly do I cache this file? How do I cache a Google analytics file?