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Iraqis in the northeastern town of Baqouba protest the arrest of a member of the Sahwa, or Awakening movement (also known as the Sons of Iraq) and a Sunni Muslim member of the Provincial Council, in May. The Sahwa, or Sunni militias, joined U.S. troops in the fight against al-Qaida in Iraq in 2007. Now, members face tough times. STR/AFP/Getty Images hide caption

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Our sense of time can be influenced by things like drinking coffee, or being on an adrenaline rush from an amusement park ride like this one at Dreamworld in Australia. Bradley Kanaris/Getty Images hide caption

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