UA alumna Savannah Guthrie, White House correspondent for NBC News, snaps a photo of the graduating class from the podium as she delivers the commencement address during the University of Arizona Spring 2011 graduation ceremonies at McKale Center on Saturday, May 14, 2011 in Tucson. Photo by Ron Medvescek/Arizona Daily Star.

Ron Medvescek/Arizona Daily Star

1866: The Rev. Charles M. Blake holds the first Presbyterian Church service in Arizona in a log cabin in Prescott.

1881: Marshall Virgil Earp of Tombstone is shot in the back and crippled for life.

1903: A fire starts in the furnace room of the Arizona State Capitol. Because of the distance of the building from the nearest fire hydrant, nearly an hour elapses before firefighters are able to turn their hoses on the blaze. The only loss is two and a half cords of cedar firewood.

1921: Aviator Samuel Davis, namesake of Davis-Monthan Air Force Base, dies in a plane crash.

1929: It is announced that military airplanes will be used to make serial photographs of the ancient irrigation canals of the Gila and Salt River Valleys before all traces of them are destroyed by modern farming and irrigation.

1971: "Today" show host Savannah Guthrie is born in Tucson.

Want to share an important event from Tucson's history? Email it to krumore@azstarnet.com.