<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by DTW1KR:
After the September 11th incident, Airlines are required to keep the curtains open at all times, so it makes sense to just remove them, rather than have them uselessly hang there.
Aaron Slater</font>
I flew DL and CO recently, and the curtains were closed. I don't think it was a regulations for airlines to keep the curtains open, I think it was just a UA policy.