The more serious side of Mr Coetzee's exploits was the mapping of these remote rivers and analysis of their water, to help ensure that villagers had clean, accessible supplies.

ECONOMIST: Hendrik Coetzee, explorer, died on December 7th, aged 35

Walton Center for Remote Sensing and Spatial Analysis at Rutgers, who led the map's development.

WSJ: Map Plots Rising Seas Street by Jersey Street

Backdoor.breut attempts to give the hacker remote control of the victim's computer, according to the analysis.

CNN: Computer spyware is newest weapon in Syrian conflict

Potentially any data that you bring into the U.S. can be subject to inspection and analysis, either at the point of entry, or a remote location.

FORBES: Welcome to the U.S., We'll Take Your Laptop Now