This day in history

July 31

1658 - Aurangzeb appoints himself Mongol emperor

1792 - Cornerstone laid for 1st US government building: US Mint in Philadelphia

1954 - Mount Godwin-Austen (K2) in the Himalayas was first climbed by an Italian expedition led by Ardito Desio.

1971 - Apollo 15 astronauts take 6½ hour electric car ride on Moon.

1991 - Russia and US sign long range nuclear weapons reduction pact.

2006 - Cuba's President Fidel Castro undergoes surgery, delegates government functions to brother Raul.