This is a very simple task, really. You won't have to risk your life or lives any of your team members. You'll concentrate only on the acquired drone. You should notice that you'll be able to issue commands to the drone. The best way to do this is by entering the tactical view (#1). The drone will have to reach Ramirez's last position (#2). You shouldn't have any problems locating this building. It would be wise to issue some more checkpoints to the drone. Thanks to that, it should come across some new enemy soldiers. That's the main advantage of the drone. You should be using it during the upcoming fights.
The drone is moving quite slowly, so it would be best to return to your team. You will have to take care of the new enemy units. The terrorists have appeared in a nearby alley (#1). It's located on your right. Remember to use larger objects for cover. You should also lean out a lot. Finding Ramirez will automatically complete this mission objective. Before this happens, you should move your team to the designated building (#2). CHECKPOINT 5.