how do they smugle marjuana across the us mexican border?

Question

the senders of Mexican marijuana are very successful there are check points and dogs and every thing how are the still successful?
if there are please mention different methods

Answer 1

Underground tunnels.

Answer 2

You are assuming they are 1) checking everything that comes across, and 2) drugs only come through known portals.

Stop assuming, and you'll see how porous the border really is.

Answer 3

well the best way is, oh never mind if i tell you i'll have to kill you

Answer 4

anywhere....anyhow