On this day — April 17

Duke of Edinburgh, takes place at St George's Chapel, Windsor Castle.

Texas, kills 15 people and injures 160 others.

killing 11 people and injuring 70.

the final Spacelab mission.

Mozambique, and 60,000 tons of crude oil spill into the ocean.

1982 Patriation of the Canadian constitution in Ottawa by Proclamation of Elizabeth II, Queen of Canada.

provoking the Saur Revolution in Afghanistan.

The Khmer Rouge captures the capital Phnom Penh and Cambodian government forces surrender.

The damaged Apollo 13 spacecraft returns to Earth safely.

Kennedy.