Might be the intended method to get that other SIVA cluster. (Destiny)

by Korny , Dalton, Ga. US. Earth, Sol System, Tuesday, September 27, 2016, 12:15 (3072 days ago) @ breitzen

I was a little bummed out this week when I discovered the Iron Temple patrol space was so small. Well guess what happened this morning!

When I came back up, the doors had closed, but could be opened (from outside at least). Looks like there's a specific way to get on the other side without opening the door [hint] it involves fire! but if anyone opens it you can run through. Have fun exploring!

Ya know, the one on the roof of that watchtower. We just grabbed it during the first story mission instead, but it's supposedly there while you're in the Social Space.