Gas attack

It's said that Sakharov and Kruglov have been developing a high-tech mutant sensor that can detect living beings for kilometers around. We'll visit them in Yantar to see what they'd want in exchange for one being installed in Zaton.
==Walkthrough==
=== Yantar ===
Mutant attacks on the stalkers in Yantar are becoming more and more common, and Sakharov proposes that we gas their lairs underneath X-16 laboratory.
To do this, we'll need Perin-B3 gas canisters that were lost in a military convoy heading through Zaton.
=== Zaton ===
The military convoy is located on the broken bridge just north of the processing plant in southeastern Zaton. German mercenaries have dug in on and around the bridge, with 12 men stationed just north and south of it and four turrets installed directly on top of the bridge. Luckily these are all quite exposed and easy to spot from range.
An APC just south of the bridge may catch you off guard, but you can approach from the side due to ample cover and toss a grenade right underneath it. Mount the bridge and search a box in the bed of a truck for the three Perin-B3 canisters.
=== X-16 laboratory ===
Sakharov's prior warning about the dangers of the gas means we have only five minutes to place all three and exit the lab after opening the first canister. The locations of all three are noted in your PDA and pictured below.
After activating the first canister, 15 big-nosed ghouls will spawn all around the laboratory. While you could technically ignore them, killing them quickly will make your life much easier. A flamethrower, shotgun, or machinegun will do the job nicely. Exit the lab after activating the third canister and talk to Sakharov again, opening Motion Detector.
==Notes==
* The quest dialogue from both Strelok and Sakharov references bloodsuckers as the target of the mission, but the actual mutants you encounter are big-nosed ghouls. This may be a carryover from an old version of the quest.
*On the Zaton bridge, grab the bonus stash with the handheld M79 grenade launcher if you haven't already.
*Each gas canister weighs 7.8kg, so all three is 23.4kg.
*Despite the fact that this would make a lot of sense, you cannot pre-place all three canisters and then activate them in order. The first canister must be placed and activated before moving on to the other two.
==Bugs==