Along the border between Thailand and Myanmar, authorities are battling an old problem that has taken on a new face.

For years, the border area known as the "golden triangle "was the most prolific heroin-producing area in the world.

But now, the focus of illegal drug traffickers in that area has shifted to the production of millions of amphetamine pills.

Al Jazeera's Aela Callan reports.

Source: Al Jazeera