According to the United Nations, the world’s population is now 7.2 billion people as of this month. Data shows that half of the populations live in just six countries: China, India, the United States, Indonesia, Brazil and Pakistan. (via Pew Research Center)

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A Taliban suicide bomber detonated a vehicle packed with explosives Monday outside the home of a senior police officer tasked with cracking down on militants in Pakistan's largest city.

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