The collectible in Spec Ops : The Line Chapter 9 is a flag, and the game guide below, explains where to look for it.
Chapter 9 Description
Walker and his men face the truth of Dubai.
Konrad has gone rogue and forced them into a deadly game of wits.”
Number of Intel Collectibles: 1
The only Intel collectible in Spec Ops: The Line Chapter 9, is located in the starting area.
After the introductory cutscene, we begin the mission in a round hall.
If we advance we will miss the collectable; therefore, we make sure that after we gain control over our character, we turn around and check the room where this mission starts.
On the other side of the hall, we should see several candles, near a board on which we see the names of those who have died in the war.
To find and collect the intelligence item, we approach the board and get the flag near it.
In fact, this collectible, is called Konrad Flag. It is the only intelligence item in Chapter 9.
After we get it, we can continue our mission following the objectives displayed, in order to play Chapter 10.