diff --git a/README.md b/README.md
index 43f3d2d..9d6cd21 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-![An Open Guide](figures/signpost-horiz1-1600.jpg)
+![An Open Guide](figures/signpost-horiz1-1600.jpg)
 
 The Open Guide to Amazon Web Services
 =====================================
@@ -1171,8 +1171,10 @@ VPCs, Network Security, and Security Groups
 
 -	🔸Security groups are not shared across data centers, so if you have infrastructure in multiple data centers, you should make sure your configuration/deployment tools take that into account.
 -	❗Be careful when choosing your VPC IP CIDR block: If you are going to need to make use of [ClassicLink](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/vpc-classiclink.html), make sure that your private IP range [doesn’t overlap](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/vpc-classiclink.html#classiclink-limitations) with that of EC2 Classic.
--	❗If you are going to peer VPCs, carefully consider the cost of of [data transfer between VPCs](https://aws.amazon.com/vpc/faqs/#Peering_Connections), since for some workloads and integrations, this can be prohibitively expensive.
+-	❗If you are going to peer VPCs, carefully consider the cost of [data transfer between VPCs](https://aws.amazon.com/vpc/faqs/#Peering_Connections), since for some workloads and integrations, this can be prohibitively expensive.
 - ❗New RDS instances require a [subnet group](http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_VPC.WorkingWithRDSInstanceinaVPC.html#USER_VPC.Subnets) within your VPC. If you’re using the [default VPC](http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/default-vpc.html) this isn’t a concern, it will contain a subnet for each availability zone in your region. However, if you’re creating your own VPC and plan on using RDS, make sure you have at least two subnets within the VPC to act as the subnet group.
+-	❗If you delete the default VPC, the only way to create another VPC marked as “default” is to contact AWS technical support. See this [note](http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/default-vpc.html#deleting-default-vpc) in the documentation.
+-	❗Be careful with VPC VPN credentials! If lost or compromised, the VPN endpoint must be deleted and recreated. See the instructions for [Replacing Compromised Credentials](http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_VPN.html#CompromisedCredentials).
 
 KMS
 ---