1. On April 14, 1865, President Abraham Lincoln was assassinated at Ford's Theatre in Washington, D.C. by John Wilkes Booth.
2. On April 14, 1939, the historic Black Broadway theater, The Howard Theater, officially opened in Washington, D.C. and became a hub for African-American entertainers such as Duke Ellington and Ella Fitzgerald.
3. On April 14, 1969, the Washington, D.C. subway system (Metro) began construction with the groundbreaking ceremony held at Judiciary Square.
4. On April 14, 1972, the Space Shuttle Enterprise, mounted on top of a Boeing 747, made its first test flight over Washington, D.C. before making a landing at Dulles International Airport.
5. On April 14, 1984, the Vietnam Veterans Memorial Fund announced the winning design for the proposed Vietnam Veterans Memorial to be built on the National Mall in Washington, D.C.