Video has been made thanks to Nano4211. This video contains all of the visual locations of the probes in Capitol City. The map is rather large, so the video would be your best guide to get from point A to B without getting lost. Best to get these outside of a mission and it might help to just put Bulletproof Crypto on for an added measure. Make sure you get all of them around the Pentagon/Octagon as you might miss one or two because of the heavy military presence.