Conversation so far:
Who took the famous photo of Y.A. Tittle?
Morris Berman of the Pittsburgh Post-Gazette took the famous photo
When was the famous photo of Y.A. Tittle taken?
The photo was taken on September 20, 1964
What was the famous photo of Y.A. Tittle of?
The photo was of Y.A. Tittle
What was Y.A. Tittle doing in the famous picture?
Tittle, in his 17th and final season, was photographed helmet-less, bloodied and kneeling immediately after having been knocked to the ground
Was Y.A. Tittle injured in the famous photo?
He suffered a concussion and cracked sternum on the play, but went on to play the rest of the season
What else happened with Y.A. Tittle's famous photo?
Post-Gazette editors declined to publish the photo

Question: Why didn't they publish the photo?
Self-contained rewrite: Why didn't the Post-Gazette publish the photo of Y.A. Tittle?