Welcome to OSINT Exercise #015!
Task briefing:
The image below is a screenshot taken from a CIA declassified document. It depicts a caption report of an undisclosed photo taken by an agent. The text mentions a telescope “being assembled at factory“.
Your task is to find:
a) A photo that matches the description on the caption report.
b) The exact location of where the telescope was placed once completed.
Click here to open the image on a new window.
Exercise level:
For beginners: a) Medium, b) Hard
For experts: a) Easy, b) Medium

Want more? Check out the List of OSINT Exercises.
Finished? Well done! Check if your answers are correct.
Stuck? Watch the video below on how to complete OSINT Exercise #015.
User Walkthroughs:
- walnut – “Challenge to “OSINT Exercise #015”“
- [ES] Enyomir – “Solución al ejercicio 015 del Blog de OSINT de Sofía Santos.” ⭐
- Legion Soul – “OSINT Exercise #015“
- Cat Soup – “To Infinity and Beyond: Sofia Santos OSINT Exercise #015” ⭐
- Omid Sobhani – “Germany — Deciphering CIA’s Classified Document from Cold War“
- Tomi McCluskey – “Gralhix Exercise #015“
- Ragmthy – “OSINT Exercise 015“
- The Yellow Bookcase – “Gralhix OSINT exercise #015“
- Victor Mwai – “OSINT(Exercise 15)“
- Dam Coffee – “Gralhix Exercise #015“
- Cyber-Jot – “Sofia Santos’s OSINT Exercise #015“
Why is my walkthrough not showing up above?
• I’m no longer accepting walkthroughs for this specific exercise.
• One or more of your answers were incorrect or missing.
• You asked me not to include it on the list, and I’m respecting your wishes.
• You may have sent me an incorrect or incomplete link.
• You linked to a website that tracks who sees your articles (e.g, LinkedIn).
• I suspected AI was heavily involved in the production of your walkthrough.
• I suspected you just wrote a walkthrough based on my video, and not your own work.
• I haven’t had the time to actually read, and add it yet (give me at least a week).
• I forgot about it (doesn’t usually happen, but I’m not flawless).
Why do some walkthroughs have a ⭐ in front of them?
The golden star emojis were introduced on the second year anniversary of OSINT Exercises. I will be adding them to walkthroughts that I feel stand out and deserve extra recognition. You can read more about my reasoning behind the decision in my blog post: “Two Years of OSINT Exercises: The Importance of Community Learning.”
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