Narco submarines push the limits of engineering and criminal ambition. Hidden under the waves, these vessels are almost impossible to detect, thanks to smart design and clever materials. This video ...

Drug cartels have built a hidden fleet of semi-submersible and fully submersible vessels to transport cocaine across oceans.

Plus: the US is working on a new site to bypass content bans across the world This is today's edition of The Download, our weekday newsletter that provides a daily dose of what's going on in the world ...