Pictorial Schpiel: 40 Of The Most Powerful Photographs Ever Taken

Taken from http://www.buzzfeed.com/expresident/most-powerful-photographs-ever-taken where there's many more to be viewed;

Sisters pose for the same photo three separate times, years apart.

A dog named "Leao" sits for a second consecutive day at the grave of her owner, who died in the disastrous landslides near Rio de Janiero on January 15, 2011.

U.S. Army troops wade ashore during the D-Day Normandy landings on June 6, 1944.