New York Police Department Chief of Detectives Robert K. Boyce said Sunday that a gunman told bystanders to follow him on Instagram, then shot and killed two two police officers in Brooklyn Saturday. Stephanie Keith/Reuters/Landov hide caption

itoggle caption Stephanie Keith/Reuters/Landov

Whiteness Project participants were filmed talking about race. The project doesn't use their names, to encourage frankness. Feral Films, Inc. hide caption

itoggle caption Feral Films, Inc.

Martha McCullough shows off a photo of her grandfather, Christmas Moultrie, who was born on the Mulberry Grove Plantation before Gen. Sherman's army burned it down ahead of the capture of Savannah in 1864. Both McCullough and Hugh Golson, a descendant of the plantation's owner, knew Moultrie as children. Carl Elmore/Courtesy Savannah Morning News hide caption

itoggle caption Carl Elmore/Courtesy Savannah Morning News

Sony Pictures Studios headquarters building is seen in Culver City, Calif., on Friday. President Obama has criticized Sony for cancelling distribution of The Interview following after the studio was hacked by North Korea. Damian Dovarganes/AP hide caption

itoggle caption Damian Dovarganes/AP

A couple walks on the beach in the resort area of Varadero, Cuba. Varadero is home to upscale hotels and resorts that cater to foreign tourists, but there aren't yet enough to handle a potential influx of Americans. David Gilkey/NPR hide caption

itoggle caption David Gilkey/NPR