Stephane "Charb" Charbonnier, the late editor of Charlie Hebdo, is seen in September 2012. PEN American Center's decision to give the French satirical magazine its annual Freedom of Expression Courage Award has prompted six writers to withdraw from the annual event. Michel Euler/AP hide caption

itoggle caption Michel Euler/AP

Jackson Pollock cooks with his wife, the artist Lee Krasner, and his mother, Stella Pollock, in the kitchen of his home in Springs, in East Hampton, N.Y., 1950. Courtesy Pollock‑Krasner House and Study Center hide caption

itoggle caption Courtesy Pollock‑Krasner House and Study Center