>> diaz: there have been 115 justices on the u.s. supreme court, all but seven have been white men. a black woman has never been nominated until now. judge ketanji brown jackson, selected by president biden, could be the first. as cbs' nikole killion reports, the decision follows some powerful women leading the charge. >> i'm pleased to nominate judge jackson. >> reporter: as soon as president biden made his supreme court nomination official... >> thank you very much. >> reporter: ...for these women, it was pure joy. >> i was ecstatic. i was-- it was something that i personally had been working for. >> reporter: kim tignor is one of the founders of the group "she will rise." the collective has been dedicated to elevating an african american woman to the high court, launching a petition and a website to track judicial nominations. why do you feel it's important to have a black woman on the supreme court?