Upping arms: the new three-way nuclear race

The calculus of the cold war is back, but there are new variables in the equation—namely China’s growing arsenal. We look at how three-way deterrence could work. Two years after America’s schools reopened their doors, a terrifying proportion of students are still skipping class (10:13). And what a slew of rickshaw apps says about India’s technological backbone (15:38).For full access to print, digital and audio editions of The Economist, try a free 30-day digital subscription by going to www.economist.com/intelligenceoffer