On this Day May 30
2009 – The Black Eyed Peas enter their seventh week on top of the pop chart with “Boom Boom Pow.” The track holds at No. 1 for 12 weeks and goes on to capture a Grammy Award for Best Short Form Music Video.
1922 – Supreme Court Chief Justice William Howard Taft, formerly U.S. president, dedicates the Lincoln Memorial in Washington, D.C. President Abraham Lincoln’s only surviving son, Robert Todd Lincoln, is a special guest at the dedication ceremony, receiving an ovation when he reaches his seat.
1971 – The unmanned spacecraft Mariner 9 launches on a mission to gather scientific information from Mars. It circles the Red Planet twice each day for almost a year, photographing the surface and analyzing the atmosphere with infrared and ultraviolet instruments.
1990 – With the Soviet economy on the brink of collapse, Soviet leader Mikhail Gorbachev arrives in Washington, D.C., for three days of talks with President George H. W. Bush. The summit centers on the issue of Germany and its place in a changing Europe.