Friend or foe? An Afghan man waits patiently while British forces check samples from his clothes for explosives. The farmer, from Babaji in central Helmand, was detained for about 45 minutes when Afghan troops at a nearby checkpoint thought he was acting suspiciously. The tests were inconclusive. Afghan solders searched his house and found nothing.

Friend or foe? An Afghan man waits patiently while British forces check samples from his clothes for explosives.

The farmer, from Babaji in central Helmand, was detained for about 45 minutes when Afghan troops at a nearby checkpoint thought he was acting suspiciously. The tests were inconclusive. Afghan solders searched his house and found nothing.