Child soldiers in Colombia describe life on front line
13 November 2013 Last updated at 01:27 GMT
Colombia's civil war has been raging for over 50 years - with armed paramilitary and guerrilla groups from both sides accused of recruiting children to fight in the conflict.
Reporter Tom Esslemont met young boys trained by the Farc - Colombia's largest guerrilla group. They told him how they were taught to stalk the lush undergrowth, and how they had seen their friends killed on the front line.
They are now being rehabilitated at a government-run centre in the mountains of Western Colombia.
Filmed by Keith Morris; produced by Harriet Shawcross
Full-length versions of Tom Esslemont's investigation can be seen on Newsnight on BBC2 on Thursday and in Our World this weekend on BBC World News. A radio version is available in this week's Assignment on the BBC World Service.