In this Pulitzer Prize winning photo taken by John Filo, a 22 year-old student, Mary Ann Vecchio kneels beside a student who’d been shot. Though the photo that first circulated turned out to be manipulated, this is the original, un-doctored version.

MSNBC's Throwback Thursday

Take a look back at moments in history with MSNBC's "Throwback Thursdays" a photo journey from politics to pop culture, and everything in between.