Berlin's weekly DW/TV Global 3000 recently aired a fascinating report about narco subs that I haven't seen anywhere else.
Surprisingly...they don't make it easy to access.
So...view "previous edition" to see description.
The actual report starts 2 mins. in...and lasts til 9:00.
You'll learn that each sub takes only about 2 weeks to build...costs $1 million each...can transport 5-10 tons of cocaine...and that subs move about 1/3 of Colombia's cocaine.