What national guard prevented the person Hazel Bryan Massery is famous for shouting at from entering a school?
Hazel Massery:  She was depicted in an iconic photograph that showed her shouting at Elizabeth Eckford, one of the Little Rock Nine, during the school integration crisis. Elizabeth Eckford: Elizabeth Eckford (born October 4, 1941) is one of the Little Rock Nine, a group of African-American students who, in 1957, were the first black students ever to attend classes at Little Rock Central High School in Little Rock, Arkansas. Elizabeth Eckford:  Elizabeth's public ordeal was captured by press photographers on the morning of September 4, 1957, after she was prevented from entering the school by the Arkansas National Guard.
Arkansas National Guard