title: Where is externally loaded resource (JS/CSS) Cache Control TTL set?
body: <p>We have an SEO individual telling us to change the Cache TTL properties for a number of elements on the page - including externally loaded JS and CSS files.</p>
  
  <p>Can you do that, without setting up those resources to be served from your server?  Aren't the cache TTL settings set by the server it comes from?</p>