India continues to modernize its nuclear arsenal, with at least four new weapon systems now under development to complement or replace existing nuclear-capable aircraft, land-based delivery systems, and sea-based systems. India is estimated to have produced enough plutonium for 150–200 nuclear warheads but has likely produced only 120–130. Nonetheless, additional plutonium will be required to produce warheads for missiles now under development, and India is reportedly building two new plutonium production facilities. India’s nuclear strategy, which has traditionally focused on Pakistan, now appears to place increased emphasis on China. The Nuclear Notebook is always free in our digital journal. Read Indian Nuclear Forces, 2017, in the July/August issue.