July 2 (UPI) -- On this date in history: In 1776, the Second Continental Congress formally adopted a resolution for independence from Britain. In 1788, it was announced in the U.S. Congress that the new Constitution had been ratified by the required nine states, the ninth being New Hampshire. In 1839, slaves being shipped to Cuba revolted and seized the ship Amistad, leading to an eventual end of the African slave market. In 1881, U.S. President James Garfield was shot by Charles J. Guiteau, a mentally unstable lawyer and office-seeker. Garfield died Sept. 19 and was succeeded by Vice President...