diff --git a/Summit2Day1.md b/Summit2Day1.md
index 426b0e0..a6703fd 100644
--- a/Summit2Day1.md
+++ b/Summit2Day1.md
@@ -58,6 +58,7 @@ expected vs required vs known, k-of-N, H, points, understandability
       slightly below N (to improve upload availability) and computes and
       uses a k that maximizes performance (or minimizes cost) while achieving
       a target reliability.
+    - whiteboard: [grid1](../raw/attachments/Summit2Day1/day1-grid1.jpg), [grid2](../raw/attachments/Summit2Day1/day1-grid2.jpg)
 
 ## encrypted git, or revision control on tahoe
     - Zack(?) is thinking about revision control on top of Tahoe, will