Final answer:
Robert Weaver was the first African American to hold a cabinet position in the United States government, appointed as the Secretary of Housing and Urban Development (HUD) by President Lyndon B. Johnson.
Step-by-step explanation:
Robert Weaver was a significant figure in American history. He was the first African American to hold a cabinet position in the United States government. In 1966, President Lyndon B. Johnson appointed Weaver as the Secretary of Housing and Urban Development (HUD). This appointment was significant because it marked a major milestone in the Civil Rights Movement and demonstrated the changing attitudes towards racial equality in the country.