In 1788: The U.S. Constitution went into effect as the ninth state ratified it.
In 1964: Civil rights workers Michael H. Schwerner, Andrew Goodman and James E. Chaney disappeared in Philadelphia, Miss.; their bodies were found buried in an earthen dam six weeks later.
In 1982: John Hinckley Jr. was found innocent by reason of insanity in the shootings of President Reagan and three other men.
In 1989: The Supreme Court ruled that burning the American flag as a form of political protest is protected by the First Amendment.