Routine Physical

This mission is another where you cannot be detected but there is a huge catch.
You start off in car 1 and have 3 guards to get past to turn off the security to the final car.
Once you do this you have 5:30 to get through 8 guarded cars. Each car has at least 2 guards in it.
If you don't have stealth down by now you better learn it fast since that is the only way to get to the end.
Don't rush this mission since you have plenty of time.
Once you get to the back of the train, you have to obtain a key card to get off the train.
Easy enough - go to the next car and do battle to obtain the key.

Nothing to add to your inventory on this mission.