JUDY WOODRUFF:

It was one year ago that the so-called Marines united scandal broke. Hundreds of current and former Marines were posting explicit photos of women, including female Marines on a private Facebook group.

Senior leaders in the Corps vowed to punish those involved, and to root out a culture of misogyny further revealed by this scandal.

William Brangham is back with this report about what happened, and how Marine leaders are trying to stop it.