1973

The Paris Peace Accords were signed on January 27, 1973, officially ending U.S. involvement in the Vietnam War.

The Twin Towers of the World Trade Center in New York City were officially opened on April 4, 1973. At the time of their completion, they were the tallest buildings in the world, becoming iconic symbols of New York's skyline.

NASA launched Skylab, the United States’ first space station, on May 14, 1973.