Final answer:
In 1960, interracial marriages were illegal in a dozen U.S. states, but the Supreme Court's decision in Loving v. Virginia in 1967 made them legal nationwide.
Step-by-step explanation:
Interracial marriage refers to a marital union between individuals from different racial backgrounds or ethnicities. Over the years, attitudes toward interracial marriages have evolved, and legal restrictions against such unions have been dismantled in many countries.
In 1960, there were a dozen U.S. states where interracial marriages were illegal. These states had laws that prohibited marriages between individuals of different races. However, in 1967, the Supreme Court's decision in Loving v. Virginia overturned these laws and made interracial marriages legal nationwide.