On April 23, 1635, the Boston Latin School, the first public school in what would become the United States, was established.

In 1898, Spain declared war on the United States, which responded in kind two days later.

In 1971, hundreds of Vietnam War veterans opposed to the conflict protested by tossing their medals and ribbons over a wire fence constructed in front of the U.S. Capitol.

In 1988, a federal ban on smoking on domestic airline flights of two hours or less (accounting for 80% of all U.S. flights) went into effect.

In 2005, the video-sharing website YouTube uploaded its first clip, “Me at the Zoo,” of co-founder Jawed Karim standing in front of an elephant enclosure at the San Diego Zoo.

In 2007, Boris Yeltsin, Russia’s first popularly elected president, died in Moscow at age 76.