While playing the ,,Siege of the Warmind" daily heroic misson I passed the original entrance to the last fight, and guess what it was opened. I went in i heard screaming from Bunker War-4 and found a passway which was closed i moved closer to the closed door and my radar showed me that there was a lot of enemies. I throwed a smoke and it damaged them. I tryed to get in every single way but what i was able to find was Nothing! Try to do the same as I did and write back if it happened to you ,too. I need help to figure this out couse this should maybe leed to an other secret exotic!