diff --git a/Summit2Day3.md b/Summit2Day3.md
index 2b39ef3..d2b62c8 100644
--- a/Summit2Day3.md
+++ b/Summit2Day3.md
@@ -54,3 +54,5 @@ No video due to technical problems.
    would need to spot these and be able to roll back to v1. Servers
    would need to report all versions that had been committed. Readers
    could see v1 and v2 and deliver v1 if v2 is not recoverable.
+* quick review of MDMF, bringing David-Sarah's diagram up-to-date
+ * [whiteboard](../raw/attachments/Summit2Day3/day3-MDMF.jpg)