Fifty years after Douglass’s death, Hayden commemorated his legacy as a powerful advocate for freedom and equality.

And four other intriguing things: a new type of computing, unintended consequences, a poem about Boyz II Men, and defending 'nucular.'

These images reveal our nation’s most persistent tensions.

My mother survived Hitler’s crimes; my father survived Stalin’s. Yet only one of those leader’s nations ever faced justice.