Welcome to OSINT Exercise #015!
Task briefing:
The image on the right 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.
Difficulty level:
Beginners: a) Medium, b) Hard
Experts: a) Easy, b) Medium

Solution and full walkthrough
Are you stuck?
That’s ok, it happens to us all. You can try again later or watch my detailed explanation on how to overcome all obstacles with an OSINT mindset. Next time you’ll know exactly what to do.
Did you complete it?
Well done! You should always verify your answers and try to expand your skill set by watching my video or by reading walkthroughs created by other OSINT community members.
Looking for more challenges?
If you’re feeling lucky, try one of these random exercises:
Otherwise, the complete List of OSINT Exercises has plenty of other options.
(or you can just try refreshing this page to get a different selection)
New OSINT exercises will be announced on these social media platforms.
Don’t miss out!
List of walkthroughs created by the OSINT community for this exercise
- walnut – “Challenge to “OSINT Exercise #015–
- [ES] Enyomir – “Solución al ejercicio 015 del Blog de OSINT de SofÃa Santos.” â
- Legion Soul – “OSINT Exercise #015“
- Cat Soup – “To Infinity and Beyond: Sofia Santos OSINT Exercise #015” â
- 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“
How do I submit my walkthrough?
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Why is my walkthrough not showing up?
- I’m no longer accepting walkthroughs for this specific exercise.
- One or more answers were incorrect or missing.
- The link you sent me was incorrect or incomplete.
- The walkthrough was hosted on a platform that tracks viewers (e.g, LinkedIn).
- I suspected AI was heavily involved in the production of your walkthrough.
- I suspected the walkthrough was written primarily by following my video rather than your original work.
- I haven’t had the time to review and add it yet.
- I forgot about it (doesn’t usually happen, but I’m not flawless).
Why do some walkthroughs have a star in front of them?
The golden star emojis were introduced on the second year anniversary of OSINT Exercises. I use it to highlight walkthroughts that I feel stand out and deserve extra recognition for quality, originality, or depth.
You can read more about the reasoning behind my decision in blog post: “Two Years of OSINT Exercises: The Importance of Community Learning.”
Do you have questions? I might have the answers!
- How can I start a career in OSINT?
- What tools do you use?
- What is your operating system?
- How to gain experience in OSINT?
- What books should I read?
- Can I use your content?
- Which certifications do I need?
- Can I send you my CV?
- Can you be my mentor?
- Do you have an OSINT course?