April 26 - In the Ukraine, one of the reactors at the Chornobyl (Chernobyl) nuclear plant explodes creating the worlds worst nuclear disaster. 31 are killed directly by the incident and many thousands more were exposed to significant amounts of radioactive material.
April 27 - Captain Midnight (John R. MacDougall) hijacks HBO's satellite and transmits his own message to HBO viewers.
November 3 - Iran-Contra Affair: The Lebanese magazine Ash-Shiraa reports that the United States has been selling weapons to Iran in secret in order to secure the release of seven American hostages held by pro-Iranian groups in Lebanon.
November 21 - 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 Contras rebels in Nicaragua.
November 25 - Iran Contra Affair: US Attorney General Edwin Meese announces that profits from covert weapons sales to Iran were illegally diverted to the anti-communist Contra rebels in Nicaragua.
November 26 - Iran-Contra scandal: US President Ronald Reagan announces that as of December 1 former Senator John Tower, former Secretary of State Edmund Muskie, and former National Security Adviser Brent Scowcroft will be serving as members of the Special Review Board looking into the scandal (they became known as the Tower Commission).
Commonly considered the start date of the golden age of old school rap