In this Sky News special report, one of Mexico's most infamous cartels gives correspondent Stuart Ramsay unprecedented access to its industrial-scale drug labs. Across the country, gangs are profiting from the insatiable appetite for illegal drugs like crack cocaine and methamphetamine from neighbouring America and, further afield, Europe. It's a billion dollar a year industry - and virtually all walks of life are involved. SUBSCRIBE to our YouTube channel for more videos: http://www.youtube.com/skynews Follow us on Twitter: https://twitter.com/skynews and https://twitter.com/skynewsbreak Like us on Facebook: https://www.facebook.com/skynews Follow us on Instagram: https://www.instagram.com/skynews For more content go to http://news.sky.com and download our apps: Apple https://itunes.apple.com/gb/app/sky-news/id316391924?mt=8 Android https://play.google.com/store/apps/details?id=com.bskyb.skynews.android&hl=en_GB