At a rundown market on the Indonesian island of Batam, a small location tracker was beeping from the back of a crumbling second-hand shoe store. A Reuters reporter followed the high-pitched ping to a mound of old sneakers and began digging through the pile.
There they were: a pair of blue Nike running shoes with a tracking device hidden in one of the soles.
These familiar shoes had travelled by land, then sea and crossed an international border…