diff --git a/_sass/new/mission.scss b/_sass/new/mission.scss
index b985d7e..7673bec 100644
--- a/_sass/new/mission.scss
+++ b/_sass/new/mission.scss
@@ -12,6 +12,9 @@ content .mission{
 
 .o-bg{
     background-color: black;
+    // https://pixabay.com/photos/rough-horn-alpine-2146181/
+    // Free for commercial use
+    // No attribution required
     background-image: url(/assets/img/o-bg.png);
     background-repeat: no-repeat;
     background-size: cover;