title: What is a TTL 0 in CloudFront useful for?
body: <p>Some weeks ago Amazon announced that they have lowered the content expiration period:</p>
  
  <p><a href="http://aws.amazon.com/about-aws/whats-new/2012/03/19/amazon-cloudfront-lowers-minimum-expiration-period/">Amazon CloudFront Lowers Minimum Content Expiration Period</a></p>
  
  <p>So much that you can actually set now TTL in CloudFront to 0. So my question is, why could it be useful to have a CloudFront distribution with TTL set to 0. To me this means no caching at all so every request that gets to CloudFront will end up hitting the origin.</p>
  
  <p>What am I missing?</p>