All questions are worth 20 points: Explain how drugs are smuggled from Mexico

All questions are worth 20 points:
Explain how drugs are smuggled from Mexico into the United States.
Discuss the pros and cons of street-level drug law enforcement.
Discuss the difference between legalization and decriminalization.
How is the United States trying to combat ecstacy use in the United States and where does most of the ecstacy originate from? 
Discuss what has been attempted to reduce the supply of controlling drugs at their source of origin, as well as, attempts to reduce demand by expanding treatment.