What bold step did a mathematician named miriam mann take at langley to fight against racial discrimination?

The inventor cocreated the film fred arts sneeze which was one of the first american movies

During the cold war, the united states was involved in certain regional conflicts due to fears later called the domino theory, which stated which concept?

Match the people with the appropriate description. vernon and irene castle arthur murray fred astaire willi ninja a. stylized the forms of ballroom dance by incorporating other dance forms b. responsible for renewing the influence of ballroom dance in america c. godfather of vogue danced. responsible for standardization/teaching of steps leading to spread of ballroom dance education