Today in History: Roosevelt Becomes Youngest US President, Princess Grace of Monaco Dies

On September 14, 1901, Theodore Roosevelt assumed the presidency after McKinley's death; in 1982, Princess Grace of Monaco died from a car crash injury.

Theodore Roosevelt became the youngest-ever US president at age 42 following the death of President William McKinley in 1901.
Princess Grace of Monaco, formerly actress Grace Kelly, died at age 52 from injuries sustained in a car crash on September 13, 1982.
In 1847, during the Mexican-American War, US forces under General Winfield Scott captured Mexico City.
The first naval engagement of the Civil War occurred in 1861 when the USS Colorado sank the Confederate schooner Judah.
Significant events on this day include a national peace pact signed in South Africa in 1991 and the end of the 1994 baseball season due to a players' strike.