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@@ -662,7 +662,7 @@ S3
 -	🔸Be careful not to make implicit assumptions about transactionality or sequencing of updates to objects. Never assume that if you modify a sequence of objects, the clients will see the same modifications in the same sequence, or if you upload a whole bunch of files, that they will all appear at once to all clients.
 -	🔸S3 has an [**SLA**](https://aws.amazon.com/s3/sla/) with 99.9% uptime. If you use S3 heavily, you’ll inevitably see occasional error accessing or storing data as disks or other infrastructure fail. Availability is usually restored in seconds or minutes. Although availability is not extremely high, as mentioned above, durability is excellent.
 -	🔸After uploading, any change that you make to the object causes a full rewrite of the object, so avoid appending-like behavior with regular files.
--	🔸Eventual data consistency, as discussed above, can be surprising sometimes. If S3 at suffers from internal replication issues, an object may be visible from a subset of the machines, depending on which S3 endpoint they hit. Those usually resolve within seconds; however, we’ve seen isolated cases when the issue lingered for 20-30 hours.
+-	🔸Eventual data consistency, as discussed above, can be surprising sometimes. If S3 suffers from internal replication issues, an object may be visible from a subset of the machines, depending on which S3 endpoint they hit. Those usually resolve within seconds; however, we’ve seen isolated cases when the issue lingered for 20-30 hours.
 -	🔸**MD5s and multi-part uploads:** In S3, the [ETag header in S3](http://docs.aws.amazon.com/AmazonS3/latest/API/RESTCommonResponseHeaders.html) is a hash on the object. And in many cases, it is the MD5 hash. However, this [is not the case in general](http://stackoverflow.com/questions/12186993/what-is-the-algorithm-to-compute-the-amazon-s3-etag-for-a-file-larger-than-5gb) when you use multi-part uploads. One workaround is to compute MD5s yourself and put them in a custom header (such as is done by [s4cmd](https://github.com/bloomreach/s4cmd)).
 -	🔸**US Standard region:** Most S3 endpoints match the region they’re in, with the exception of the us-east-1 region, which is called 'us-standard' in S3 terminology. This region is also the only region that is replicated across coasts. As a result, latency varies more in this region than in others. You can minimize latency from us-east-1 by using *[s3-external-1.amazonaws.com](http://s3-external-1.amazonaws.com/)*.