Over 60 years ago, the Little Rock Nine broke a racial barrier. Today, they question US progress

Confronted by an angry mob hurling rocks and death threats, 15-year-old Minnijean Brown-Trickey pushed her way through the crowd, only to be stopped by National Guardsmen.

Confronted by an angry mob hurling rocks and death threats, 15-year-old Minnijean Brown-Trickey pushed her way through the crowd, only to be stopped by National Guardsmen.