For an 11-year-old, the future is a short span of time—the next hour, the following day at a stretch. And that’s as it should be. When Rishab Nanda first heard that some terrorists had entered the Taj Mahal Palace and Tower, he felt happy. That meant school would be closed the next day. But as he sat with his parents and watched what was happening on TV, the effervescence of an unexpected holiday vanished, to be replaced by a weighty sense of fear.