diff --git a/commands/aws.ipynb b/commands/aws.ipynb
index f1a03d9..a0be60d 100644
--- a/commands/aws.ipynb
+++ b/commands/aws.ipynb
@@ -1,7 +1,7 @@
 {
  "metadata": {
   "name": "",
-  "signature": "sha256:f75051e8768199fb18b1e41e2b9e76d496309c12f65bffda915754795767ecb3"
+  "signature": "sha256:a0e8d0242f04dd2d399759e132a0d586ef06b84f9af2e89105e2835e56d40b2a"
  },
  "nbformat": 3,
  "nbformat_minor": 0,
@@ -60,7 +60,9 @@
      "cell_type": "markdown",
      "metadata": {},
      "source": [
-      "## S3DistCp"
+      "## S3DistCp\n",
+      "\n",
+      "[S3DistCp](http://docs.aws.amazon.com/ElasticMapReduce/latest/DeveloperGuide/UsingEMR_s3distcp.html) is an extension of DistCp that is optimized to work with Amazon S3.  S3DistCp is useful for combining smaller files and aggregate them together, taking in a pattern and target file to combine smaller input files to larger ones.  S3DistCp can also be used to transfer large volumes of data from S3 to your Hadoop cluster."
      ]
     },
     {