When devastating floods swept through Assam in northeastern India in 2018, the disaster quickly triggered a troubling question within New Delhi’s security corridors: could control over the weather become a new tool of geopolitical pressure or warfare?As technology advances, could control over the weather become a tool of geopolitical pressure, or even a weapon?Much of the concern centred on neighbouring China. Assam’s then finance minister, Himanta Biswa Sarma, publicly warned about Beijing’s Tianhe, or Sky River, initiative, one of the world’s largest weather-modification programmes. Indian villagers resist mega dam meant to counter China water threatThe project, which was first raised…