In the summer of 2016, a dizzying photograph from Chennai, in the Indian state of Tamil Nadu, circulated through international media outlets. The photo shows about a thousand Indian schoolchildren dressed in white and blue uniforms, their bodies arranged in rows of twos and fours and fives, their arms clasped in acute triangles above their heads. On the ground, there must have been pandemonium: young children, fatigued by the scorching June heat, confused by what they were doing or why they were being told to stand still. But from above, an aerial camera caught the shot, decoding the labyrinthine mess of blazing, colorful bodies as they spelled out a message: KEEP SMILING.