This Day in History

Battles of Lexington and Concord (1775)
The Battles of Lexington and Concord were the opening engagements of the American Revolution. While marching from Boston to Concord to seize colonists' military stores, a British force of 700 was met at Lexington by 77 local minutemen. After a brief exchange of shots, the outnumbered colonists fell back. The British continued on to Concord, where they were defeated by a militia of about 500. Who had been sent to warn the people of the Massachusetts countryside about the impending British attack? Discuss

Construction of St. Peter's Basilica Begins (1506)
With a capacity of over 60,000 people, St. Peter's Basilica is the one of the world's largest churches as well as one of the world's holiest Catholic sites. Begun by Pope Julius II in 1506 and completed more than a century later, it was built to replace Old St. Peter's, erected by Constantine over Peter's traditional burial site. Michelangelo and Bernini were among its many architects, and a number of their masterpieces adorn its interior. Why is St. Peter's not considered a cathedral?

Ill-Fated Apollo 13 Spacecraft Returns to Earth Safely (1970)
Less than a year after the first lunar landing, Apollo 13 departed for the moon. Two days into the mission, an oxygen tank exploded, severely damaging the spacecraft's electrical system, and the landing had to be aborted. Despite limited power, loss of cabin heat, a shortage of potable water, and the need to improvise a carbon dioxide removal system, the craft returned safely to Earth. The immortal line from the mission—"Houston, we have a problem"—is a misquote. What was actually said?