A senior commander in the Syrian opposition army has said ISIS is still a very real threat, with up to 3,000 fighters hiding in the east of the country.

Sky News has been given unique access to the controversial Turkish military-controlled buffer zone, where many ordinary Syrians have suffered life-changing injuries.

The area is hugely controversial: nearly a year ago Turkish troops moved thirty kilometres deep into Syrian territory and positioned forces along the Syrian border.

SUBSCRIBE to our YouTube channel for more videos: http://www.youtube.com/skynews

Follow us on Twitter: https://twitter.com/skynews

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

Sky News videos are now available in Spanish here/Los video de Sky News están disponibles en español aquí: https://www.youtube.com/skynewsespanol