http://observer.guardian.co.uk/uk_news/story/0,6903,1567279,00.html
"Police in swaths of London are being 'overwhelmed' by Vietnamese gangs flooding the streets with high-strength, home-grown cannabis.
The gangs, who have also been linked to murders, people-smuggling and kidnapping, are making millions of pounds by renting houses from unsuspecting landlords and converting them into sophisticated cannabis farms."
