This statue of John Campbell Greenway, shown outside the Arizona History Museum, 949 E. Second St., just outside the University of Arizona campus in Tucson. The sculptor of this statue is Gutzon Borglum.

Benjie Sanders/Arizona Daily Star

1869: John Wesley Powell and his party begin their historic exploration of the Colorado River.

1915: Arizona and California celebrate the opening of the new "Ocean to Ocean" highway bridge at Yuma.

1925: R.J. Jones of Phoenix, who owns a 160-acre tract of land located a mile and a half from the Casa Grande Ruins, announces the land will be subdivided and a new town called Coolidge would be built.

1930: The State of Arizona presents a bronze statue of 20th century mining engineer John Campbell Greenway — designed by Mount Rushmore sculptor Gutzon Borglum — to the U.S. Capitol's Statuary Hall in Washington, D.C. (Click here to read more about this Tucson oddity.) The other statue representing Arizona is of Father Eusebio Kino. Sonoita artist Deborah Copenhaver Fellows completed a sculpture of former presidential candidate Barry Goldwater, which replaces the Greenway statue.

1977: Two brothers rob a Purolator Inc. armored truck on Interstate 17 north of Phoenix and escape with almost $300,000. The next day they drive to Lake Mead and kill the two guards by drowning them. The brothers are now on death row.

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