In a now famous moment during the 2008 presidential primaries, Hillary Clinton fought back tears after an undecided voter asked her how she managed to keep at it, day after day. Above, Clinton responds to a reporter's question about that uncharacteristic display of emotion. Joe Raedle/Getty Images hide caption

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The stairs at the entrance of the tube station shelter at Bethnal Green, London, on March 5, 1943, where a disastrous crush of people occurred two days before. AP hide caption

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