Baluchistan is a restive region shared by Iran and Pakistan where security forces on both sides of the border have for years battled militant groups but which now risks being the subject of escalating tensions between the neighbours. Both Iran's southeastern province of Sistan-Baluchistan and Pakistan's western province of Balochistan are the most impoverished regions of their respective countries, vast and arid provinces constantly battling drought, with rampant unemployment. They are home to the Baluch people, who number overall an estimated 10 million, the majority of whom live in Pakistan including also in the Sindh province, with several million in...