How likely was it that one plane would fly into the World Trade Center, let alone two?<p>I&#x27;m not going to go too deeply into speculative scenarios, but all kinds of business-interrupting calamities are possible with very low probability. We just had the story on the frontpage about the Juniper backdoor; do you think S3 isn&#x27;t being targeted by multiple state intelligence agencies?<p>Basically I agree with <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10772321" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10772321</a> - by all means keep the working copy online, but have a local offline backup.