Powerful PicturesThree sisters pose for photographs taken years apart. A Russian war veteran visits the tank that he fought in which has been preserved as a monument. A child gives a gift to riot police in Bucharest. Retired Police Chief Captain Ray Lewis is arrested at an Occupy Wall Street protest. A monk prays over the body of an elderly stranger who died suddenly while waiting on a train in China. A dog named Leao keeps watch by the the grave of his owner who was killed in a landslide in Rio de Janeiro. Tommie Smith and John Carlos raise their fists in a gesture of solidarity at the 1968 Olympic games. John F. Christians protect Muslims during the 2011 Cairo uprisings. A North Korean man waves his hand as a South Korean relative weeps, following a luncheon meeting during inter-Korean temporary family reunions at Mount Kumgang resort October 31, 2010. A dog is reunited with his master after the 2011 Japanese Tsunami. A mother comforts her son following the 2011 tornado in Concord, Alabama.