Relations between India and Pakistan are cratering following a deadly militant attack in Indian-administered Kashmir that has sparked tit-for-tat reprisals and raised fears of another military escalation between the nuclear-armed rivals.

India and Pakistan have intensified their hostilities over the hotly contested Kashmir region following a massacre of 26 mostly Indian tourists, which New Delhi linked to Pakistan

Will India be able to stop the Indus river and two of its tributaries from flowing into Pakistan? That's the question on many minds, after India suspended a major treaty governing water sharing of six rivers in the Indus basin between the two countries,