APOPO (an acronym for Anti-Persoonsmijnen Ontmijnende Product Ontwikkeling: “Anti-Personnel Landmines Detection Product Development” in English) is a Belgian non-governmental organization which trains African giant pouched rats to detect landmines and tuberculosis.

Bart Weetjens, the founder of APOPO knew that rats, with their strong sense of smell and trainability, could provide a cheaper, more efficient, and locally available means to detect landmines.

Using African giant pouched rats to detect landmines has several advantages. The rats are indigenous to sub-Saharan Africa, where they are used and, thus, are well-suited to the climate and are resistant to many endemic diseases.[6] They are also widely available and inexpensive to procure.

In the minefields, the rats are too light to detonate a pressure-activated mine by walking over it. Their small size also means that the rats can be easily transported to and from operational sites.

I should have trained my rats to do this kind of thing…

Video via on YouTube.
Quoted text via Wikipedia.