Event:
Oscar-winning film 'Frozen' beats 'Toy Story 3' over the weekend to become the highest-earning animated movie in history
More Notable Events on March 30:
1981 President Reagan shot and wounded by John W Hinckley III
1953 Einstein announces revised unified field theory
1932 Amelia Earhart is 1st woman to fly solo cross the Atlantic
1909 Queensboro Bridge opens, linking Manhattan and Queens
1867 U.S. buys Alaska from Russia for $7,200,000
