What is the fine-grained topic of the following text: If NASA had some drones and wanted to I imagine they would have realistically considered using a few drones with cameras, to do some videos as well as provide visual information of the landing site and the physical condition of the lander to let everyone at JPL know exactly what things looked like from a camera lens from many different points of view. Only return the topic.
Using drones for surveillance and information gathering in NASA missions