Event:
Portuguese president Bernardino Machedo resigns after coup
More Notable Events on May 31:
1990 Seinfeld starring Jerry Seinfeld, debuts on NBC as Seinfeld Chronicles
1977 Trans Alaska oil pipeline completed
1889 Johnstown Flood; 2,209 die in Pennsylvania
1879 Madison Square Garden opens
1621 Sir Francis Bacon thrown into Tower of London for 1 night
