after snipping we must destroy all the tanks.. but is it only that ? because i destroy at least 4-5 tank and another arrive.. and a nother.. and another.. and they kill me.. calling the airforce on the top of the house is it the only way to accomplish the mission ?

[Lone_Wolf]

You have to have a view over the bridge and the tanks and watch your back.

[RevRaz]

Once you snipe down the guys running on foot to the detonator, switch to binoculars. Order fire missions on the tanks. After about 4 or 5, some guys are gonna back door you in the building, shoot them. Go back to the tank area, order a few more fire missions, then more guys will back door you. Once you destroy the tanks and if you survive, you should be all set.