Drug policy expert Sanho Tree is here to answer your questions.

Drug policy expert Sanho Tree joined us to answer your questions during his trip to New Zealand.

Tree, who is the director of the Drug Policy Project at the Institute of Policy Studies in Washington, DC, fielded questions on a range of topics including what is being done to end the "War on Drugs" and whether more drugs should be legalised.

Scroll down to see if he answered your question.