We just saved this Asian scientist chick and now I ‘have to take out the tank’. I have no idea how to do this.
You need a missile launcher. There should be a launcher in some room on the 1st floor, and I also think there’s one on the roof. I’m pretty sure there are additional launchers lying around, maybe in other buildings.
Be aware a tank takes 3 missile hits to kill. Just shoot and run away until it’s down – don’t remain stationary while shooting all 3. The tanks should appear in your minimap.