George Washington died at age 67.
Alabama became the 22nd state in the United States.
DNA synthesized for the first time.
Wilma Mankiller became the first woman to lead a major American Indian tribe as she took office as principal chief of the Cherokee Nation of Oklahoma.
Nobel Peace laureate Andrei D. Sakharov died in Moscow at age 68.
Adam Lanza, age 20, forced his way into Sandy Hook Elementary School, in Newtown, Connecticut, and killed 26 people. The victims included 20 children between the ages of six and seven.