That's Dorothy Pitman Hughes with Steinem, not Angela Davis.

Lots of people make that mistake, including the NY Post editorial screen capture you included in your OP.

http://www.critical-theory.com/whoops-new-york-post-columnist-cant-tell-black-people-apart/
http://jimromenesko.com/2014/01/06/new-york-post-columnist-mistakes-dorothy-pitman-hughes-for-angela-davis/

Here's the original photo with proper attribution from the Smith College archives: http://www.smith.edu/libraries/libs/ssc/agents/steinemhughes.html

Here's a little write-up on the recreated photo in 2014:
http://nagonthelake.blogspot.com/2014/10/gloria-steinem-and-dorothy-pitman.html

Edited to add: "We are women. We are still fighting after all these years." But black women are still fighting to just be recognized, apparently.