Jon Snow presents Drugs Live: Cannabis on Trial, which examines the effects of the illegal drug. Volunteers including Jennie Bond and Jon himself take part in a six-month trial, looking at the effects on the brian using two forms of cannabis - skunk and hash. Using these results, Jon hosts a studio audience debate on UK law, legalisation and medical use. Join the discussion on Tuesday 3rd March, live from 10pm on Channel 4.