March 28, 1802 (218 years ago)
•Heinrich Wilhelm Matthäus Olbers discovers 2 Pallas, the second asteroid known to man.

March 28, 1930 (90 years ago)
•Constantinople and Angora change their names to Istanbul and Ankara.

March 28, 1979 (41 years ago)
•Operators at Three Mile Island Nuclear Power Plant in Pennsuylanis fail to recognize that a relief valve is stuck open in the primary coolant system of Unit 2 following an unexpected shutdown. As a result, enough coolant drains out of the system to allow the core to overheat and partially melt down.