This comment in chat points to a "google search of the day" which was for Buran the Soviet version of the Space Shuttle. Looking there I saw images of a large transport aircraft with the Buran shuttle on top. What caught my eye were some photos of the transport aircraft with what looks like a large, orange air data boom at the end.
My understanding from Quora answers is that these are used for supersonic flight, and I wouldn't expect this shuttle to be transported supersonically.
Question: What is this transport aircraft, and why does it sometimes cary an air data boom when the Buran shuttle is on top of it?
above: From thelivingmoon.com. Click for full size views.
I believe this is Buran itself, According to @Hobbes' correction/comment, this is the "OK-GLI: a Buran analog (shape is correct, systems are not identical to the orbital vehicle) with 4 jet engines that was used for flight testing in the atmosphere", also with an air data boom. I've kept this here because it's actually pretty cool. From pinterest.