Do you think the US government has any involvement in the surge of Heroin throughout the world?

http://www.globalresearch.ca/drug-war-american-troops-are-protecting-afghan-opium-u-s-occupation-leads-to-all-time-high-heroin-production/5358053

“In July 2000, Taliban leader Mullah Mohammed Omar, collaborating with the United Nations to eradicate heroin production in Afghanistan, declared that growing poppies was un-Islamic, resulting in one of the world’s most successful anti-drug campaigns. The Taliban enforced a ban on poppy farming via threats, forced eradication, and public punishment of transgressors. The result was a 99% reduction in the area of opium poppy farming in Taliban-controlled areas, roughly three quarters of the world’s supply of heroin at the time. The ban was effective only briefly due to the deposition of the Taliban in 2002.” http://en.wikipedia.org/wiki/Opium_production_in_Afghanistan

Since the US invasion/occupation of Afghanistan, opium production has broken records and become the world’s leader in opium production, year after year, and is now ravaging countries surrounding Afghanistan, as well as the US itself.
Iran is seeing addiction rates soaring and they blame the US for the influx of heroin.

The link provided above shows a few videos, as well as photos of US troops guarding opium fields.

What do you feel is the US governments role in this surge?