Update README.md

Author: dlebauer

README.md

@@ -16,12 +16,7 @@ Many of these tutorials have complex dependencies. In addition, many datasets ar
 The first research-grade version of TERRA REF data products will be released in November 2018. 
 Before that, we will make evaluation releases available: the alpha version was released in November 2016 and the beta version will be released in 2017.
 
-make the data available for evaluation with the goal of receiving feedback.
-are making 
-Many access data that is available online, though most require authentication.
-
 Some make use of very large files that are available. 
-These can be launched from within the [TERRA REF Sensor Data Portal](https://terraref.ncsa.illinois.edu) (requires account / access).
 
 
 ### Links
@@ -30,11 +25,7 @@ TODO: add links to quick-start documentation, README's, code for learning and ap
 
 * Data portal: terraref.org/data
 * Docker Images on Docker Hub: hub.docker.com/terraref
-* 
-
-### References
-
-
+* NDS Labs Workbench: terraref.ndslabs.org
 
 ### Slides