I'm sure the military is working on that, and I imagine it is a lot harder to interfere with a drone flying thousands of feet into the sky, than to interfere wi

I'm sure the military is working on that, and I imagine it is a lot harder to interfere with a drone flying thousands of feet into the sky, than to interfere with a ship that you could get very close to. Yet, it looks like Iran was able to use some sort of GPS Spoofing to take down a US drone last year [ https://en.wikipedia.org/wiki/Iran%E2%80%93U.S._RQ-170_incident https://en.wikipedia.org/wiki/Iran%E2%80%93U.S._RQ-170_incid... ] I agree with you and forecast that big rigs and trains will eventually be automated as well. Energy companies are already using autonomous dump trucks in Canada. [ http://motherboard.vice.com/blog/autonomous-dump-trucks-are-coming-to-canadas-oil-sands http://motherboard.vice.com/blog/autonomous-dump-trucks-are-... ]