Scientists at the Large Hadron Collider announced the discovery of the Higgs boson on July 4, the long-sought building block of the universe. This image shows a computer-simulation of data from the collider.
Gul Mohammed Khan has lost three sons in sectarian violence during the last two years, in Karachi, Pakistan. He stands here with some of his grandchildren who have lost their fathers. When he looks at his grandchildren, he says, he sees his sons.