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Rats trained to sniff out landmines in Colombia

4 April 2012 Last updated at 13:05 BST

The United Nations' International Day for Mine Awareness and Assistance for Mine Action this year falls on 4 April.

In its fight against landmines, Colombia - which is the most heavily-mined country in South America - has started training rats to detect the deadly explosive devices.

Arturo Wallace reports.