Village defense

The elite military killsquad is finally descending on Old Village, and Kolmogor needs your help to make sure they cannot re-take it.
== Walkthrough ==
Within a couple minutes of accepting the quest, two helicopters fly in and unload the troops. Don't bother taking them down immediately: Mi-24 is only vulnerable once it flies away from the landing zone, and the smaller helicopter is completely invulnerable. Kolmogor, Panther, and Pilgrim are all essential, so don't bother protecting them.
After a while, Kolmogor will say that he doesn't see the commander among them. The small invulnerable helicopter will return, unloading a small squad led by Captain Gnats. Watch out for his Maschinengewehr 42, and loot his body for an important PDA and a guaranteed Crystal Soul. 
In 40 seconds after picking Gnats' PDA up, it will play the audio record. From the audio, it follows that Gnats was looking for Panther, using her brother as a hostage, and Marked One as another leverage to lure her into the village.
Once you have the PDA and listened to the record, speak to Kolmogor to give it to him and close the mission.
Make sure to also talk to Pilgrim before leaving!
After the mission, Klyonov will send you a message to drop by the Warlab. 
As you approach the Klyonov's room, you will get a call from Kolmogor and Pilgrim, telling you that Panther has gone missing. Ignore everything about the locations they mentioned and talk to Klyonov instead, leading into Psi antenna.
== Notes ==
* Do not descend into the basement with Panther like Kolmogor asks you to. She may sit down and become passive and having her up top clearing enemies will be helpful.
* The blue suits that the non-exo elites are wearing are Healing Berils. You will likely loot a few broken ones from their bodies.
== Bugs ==
* Gnats and his squad tend to get stuck in the basement of the house they land in and refuse to leave. You can toss grenades down to kill them since trying to descend the ladder would mean a quick death.
* It's possible to speak to Kolmogor before picking up the commander's PDA. The mission can be closed as normal, and the PDA can be picked up afterwards. The audio log will not play in this case, and there's no telling if this breaks anything down the line, so it's better to reload and play the mission normally.
* If you leave the area without speaking to Pilgrim, Klyonov will have no new dialogue until you do so. Luckily you can simply return to Old Village, exhaust his dialogue, and return to Klyonov with the only consequence being wasted time.