www.thinkprogress.org/culture/2014/08/13/3470974/historian-explains-lauren-bacalls-cool-got-that-it-factor-with-a-capital-i/
"There’s an image of Lauren Bacall, who died yesterday at the age of 89, in the National Portrait Gallery. She’s one of a select few icons included in the “American Cool” exhibit, a photographic attempt to define something that eludes a satisfying definition."