1905 - Albert Einstein's paper, "Does the Inertia of a Body Depend Upon Its Energy Content?", is published in the journal "Annalen der Physik". This paper reveals the relationship between energy and mass. This leads to the mass–energy equivalence formula E = mc².
1942 - The completion of the Alaska Highway (also known as the Alcan Highway) is celebrated (however, the highway was not usable by general vehicles until 1943).
1980 - Lake Peigneur drained into an underlying salt deposit. A misplaced Texaco oil probe was drilled into the Diamond Crystal Salt Mine, causing water to flow down into the mine, eroding the edges of the hole. The resulting whirlpool sucked the drilling platform, several barges, houses and trees thousands of feet, to the bottom of the dissolving salt deposit.
1986 - Iran-Contra Affair: National Security Council member Oliver North and his secretary start to shred documents implicating them in the sale of weapons to Iran and channeling the proceeds to help fund the Contra rebels in Nicaragua.
2004 - The second round of the Ukrainian presidential election is held, unleashing massive protests and controversy over the election's integrity.
2004 - The island of Dominica is hit by the most destructive earthquake in its history. The northern half of the island receives the most damage, especially the town of Portsmouth. It is also felt in neighboring Guadeloupe, where one person is killed as a result.
2004 - The Paris Club agrees to write off 80% (up to $100 billion) of Iraq's external debt.