For those thinking of attempting to complete this on Veteran..
Do you have an abnormal amount of patience?
I hope so cos you are gonna need it.
At points in the game you will die maybe 50+ times and you will wonder if it is even possible to do
this is where your patience comes in handy. Instead of putting your controller through the screen of your 40" LCD you should try to take a different approach to the level you are stuck on.
Try charging forward to the next piece of cover. You might get lucky and trigger a checkpoint that makes the enemy retreat or you might just be in a better position to pick off the enemy without getting shot yourself.
Try slowing things down. It may seem like the enemy never stops spawning but it does. You might be shooting the same guys hiding behind the same cover for over 30 mins but eventually you will kill them all and can proceed.
Also dont forget to use your grenades. Dont save them for a special occasion. Get rid of them. Believe me you will pick more up in no time.
Dont forget to use your smoke too.
When I die, I want to go peacefully like my Grandfather did, in his sleep -- not screaming, like the passengers in his car.
The Silo has respawned enemys and nothing you can doa bout it......
everytime i get to that spot that seems impossible, just put it down and come back later...
some how i ALWAYS beat that part in only a few deaths, instead of 50 haha
I have done veteran on several accounts and in all honesty the best way i can suggest to complete it easily will be literally run forward from cover to cover as you shoot because the closer you get to them they will stop spawning. When you get stressed grab a beer watch tv and when ou have drunk it try again you'll be amazed how it works =P