That all slaves would go free.
Answer:
John F. Kennedy
Explanation:
John F. Kennedy was the 35th President of the United States.
Unfortunately, he passed away on November 22, 1963 and Vice President Lyndon B. Johnson became president.
On January 7, 1839, members of the French Académie des Sciences were shown products of an invention that would forever change the nature of visual representation: photography. The astonishingly precise pictures they saw were the work of Louis-Jacques-Mandé Daguerre (1787–1851), a Romantic painter<span> and printmaker most famous until then as the proprietor of the Diorama, a popular Parisian spectacle featuring theatrical painting and lighting effects. Each daguerreotype (as Daguerre dubbed his invention) was a one-of-a-kind image on a highly polished, silver-plated sheet of copper.</span>