Persona Non Grata
Step on the balcony and kill all enemies outside. This is also a good opportunity to try getting the “Strike” achievement. You'll have to take out 5 enemies with one grenade. See the video below for reference:
Once the doctor is taken out, go beside Soap and help him. After a few scenes, follow them outside. Kill the enemies who will barge in the hallway then continue downstairs and take out the enemies outside. Find the first intel in this mission on top of a wooden crate in inside the alcove to the left.
Continue to the streets and clear it of enemies. Enter the house beside the burning building to find another intel inside the bedroom.
Another bedroom intel
Continue fighting your way through more enemies and following Price. You'll soon encounter a large number of enemies past the gate so go through the building and enter the shed containing the UGV. You should find another intel beside the shipping crate containing the UGV.
weapon cache intel
After picking up the intel, grab the controls and make sure to take out all enemy choppers using only the UGV's grenade launcher. Take note that if ever you hit it with your machine gun, you'll miss the chance in getting the achievement so you'll have no choice but to restart the whole mission. Continue clearing enemy forces until you reach the chopper. Eventually, your UGV will get destroyed by an enemy drone.
What goes up, must go down using grenades
As soon as you get out of the storehouse, look to your left to find a slide. The last intel in this mission is found there. Once done, continue running towards the chopper and watch the following scenes. Mission complete.