Hi Andrew!
Your photo linked from Flickr isn't showing up here (just a message saying it is no longer available).
You may wish to try uploading the photo directly with your post. To do so, just click on "Additional Options" in the lower-left when making a post, then on "Browse" and go to where the photo is stored on your computer. Presto! It'll appear below your post and will stay with it, since it is co-hosted.
Hope this helps.
Best,
Dan.