Sergeant En pointed to the flamers of his men.  (one of the Imperial ones, rather than the odd ones that must have been stolen off of cultists, if they even were flamers)  "Fire is a powerful motivator.  I don't think you've ever seen a man on fire run.  We'll have to scout the corridor ourselves, and it's possible that the conditions are too bad, but I think a few krak grenades ought to deal with the worst of it.  There's a particular technique we use in the Imperial Guard to tie a group of men together with steel cables, then use one way ratchets to keep them from being able to move back in the direction they came."  The sergeant said, pulling out his field kit and demonstrating the devices issued to him by the authorities, while his men showed Darius the cables.  "Very useful when you're trying to get conscripts to do something without a commissar."  Sergeant En grunted, while his men whipped the prisoners for no particular reason.  "About 1 minute worth of heavy bolter fire should destroy any bulkhead separating the corridors feeding into the security corridor, and minimize any obstacles.  External bulkheads, especially those to the sides of the security corridor and especially the vault, would be a lot harder, since they're designed to keep out the void.  Cutting through any bulkhead like that is going to take hours without ordinance grade weapons, and constitute major structural damage to the station, surely leading to costly repairs.   When the mutants start shooting at our human shields, we'll spring them forward and advance behind them.  Hopefully they'll hold out before we get into flamer range, which should be a reasonable assumption, with three heavy bolters firing behind the assault.  This is our war, and I would prefer that the serious fighting be left to the<em>professionals.</em>"