68. 1967: The First Woman to Run the Boston Marathon
In 1967, the Boston Marathon was exclusively for men. Katherine Switzer however, registered her name under her initials and disguised her identity until the race. On starting the race, she was physically restrained by the men completing the marathon, and they tried to remove her from the race. At just 20 years of age, she finished the 26-mile marathon, despite being swarmed by journalists, photographers, and even officials warning her to get out of their race. Her, her trainer, and her boyfriend of the time ended up on the papers.

Source: trend-chaser.com
67. 1941: Mount Rushmore Being Carved
Sculpted into the Black Hills region in South Dakota, the Mount Rushmore National Memorial depicts former US presidents, George Washington, Thomas Jefferson, Theodore Roosevelt, and Abe Lincoln. The sculpture was finished and open to the public in 1941, but during construction, bits of the rock that fell off were being sold for $2 a piece! Each finished face is approxomately 60 ft high.

Source: trend-chaser.com