In their ongoing attempt to satisfy the huge demand for illegal drugs one Mexican drug cartel has started to create their own armored vehicles to transport drugs. You can read about a recent siesure here:
http://www.bbc.co.uk/news/world-latin-america-13676259
If nothing else these narco-tanks are impressive. Though not as impressive as the narco-subs used by Colombian drug cartels:
http://www.bbc.co.uk/news/world-latin-america-13141498