diff --git a/README.md b/README.md
index 68afb50..f1e66f6 100644
--- a/README.md
+++ b/README.md
@@ -739,7 +739,7 @@ S3
 		-	🔸SSL is only supported on the built-in amazonaws.com domain for S3. S3 supports serving these sites through a [custom domain](http://docs.aws.amazon.com/AmazonS3/latest/dev/website-hosting-custom-domain-walkthrough.html), but [not over SSL on a custom domain](http://stackoverflow.com/questions/11201316/how-to-configure-ssl-for-amazon-s3-bucket). However, [CloudFront allows you to serve a custom domain over https](http://docs.aws.amazon.com/acm/latest/userguide/gs-cf.html). Amazon provides free SNI SSL/TLS certificates via Amazon Certificate Manager. [SNI does not work on very outdated browsers/operating systems](https://en.wikipedia.org/wiki/Server_Name_Indication#Support). Alternatively, you can provide your own certificate to use on CloudFront to support all browsers/operating systems for a fee.
 		-	🔸If you are including resources across domains, such as fonts inside CSS files, you may need to [configure CORS](https://docs.aws.amazon.com/AmazonS3/latest/dev/cors.html) for the bucket serving those resources.
 		-	Since pretty much everything is moving to SSL nowadays, and you likely want control over the domain, you probably want to set up CloudFront with your own certificate in front of S3 (and to ignore the [AWS example on this](http://docs.aws.amazon.com/AmazonS3/latest/dev/website-hosting-custom-domain-walkthrough.html) as it is non-SSL only).
-		-	That said, if you do, you’ll need to think through invalidation or updates on CloudFront. You may wish to [include versions or hashes in filenames](https://abhishek-tiwari.com/post/CloudFront-design-patterns-and-best-practices) so invalidation is not necessary.
+		-	That said, if you do, you’ll need to think through invalidation or updates on CloudFront. You may wish to [include versions or hashes in filenames](https://abhishek-tiwari.com/CloudFront-design-patterns-and-best-practices) so invalidation is not necessary.
 -	**Data lifecycles:**
 	-	When managing data, the understanding the lifecycle of the data is as important as understanding the data itself. When putting data into a bucket, think about its lifecycle — its end of life, not just its beginning.
 	-	🔹In general, data with different expiration policies should be stored under separate prefixes at the top level. For example, some voluminous logs might need to be deleted automatically monthly, while other data is critical and should never be deleted. Having the former in a separate bucket or at least a separate folder is wise.
@@ -841,7 +841,7 @@ EC2
 		- The P2 series offers NVIDIA Tesla K80 GPUs in 1, 8 and 16 GPU configurations targeting machine learning, scientific workloads, and other high performance computign applications.
 		- The G3 series offers NVIDIA Tesla M60 GPUs in 1, 2, or 4 GPU configurations targeting graphics and video encoding.
 	-	AWS offers two different AMIs that are targeted to GPU applications. In particular, they target deep learning workloads, but also provide access to more stripped-down driver-only base images.
-		-	AWS offers both an Amazon Linux [Deep Learning AMI](https://aws.amazon.com/marketplace/pp/B077GF11NF?qid=1536363169916&sr=0-3&ref_=srh_res_product_title) (based on Amazon Linux) as well as an Ubuntu [Deep Learning AMI](https://aws.amazon.com/marketplace/pp/B077GCH38C). Both come with most NVIDIA drivers and ancillary software (CUDA, CUBLAS, CuDNN, TensorFlow, PyTorch, etc.) installed to lower the barrier to usage. 
+		-	AWS offers both an Amazon Linux [Deep Learning AMI](https://aws.amazon.com/marketplace/pp/B077GF11NF?qid=1536363169916&sr=0-3&ref_=srh_res_product_title) (based on Amazon Linux) as well as an Ubuntu [Deep Learning AMI](https://aws.amazon.com/marketplace/pp/B077GCH38C). Both come with most NVIDIA drivers and ancillary software (CUDA, CUBLAS, CuDNN, TensorFlow, PyTorch, etc.) installed to lower the barrier to usage.
 		-	⛓ Note that using these AMIs can lead to lock in due to the fact that you have no direct access to software configuration or versioning.
 		-	🔸 The compendium of frameworks included can lead to long instance startup times and difficult-to-reason-about environments.
 	-	🔹As with any expensive EC2 instance types, [Spot instances can offer significant savings](#ec2-cost-management) with GPU workloads when interruptions are tolerable.