1881: The first official execution in Pima County takes place in Tucson. At 11 minutes prior to 3 p.m., Thomas Harper was hanged for killing John Talliday the previous year. Harper claimed he shot Talliday in self-defense.
1911: The City of Prescott Chamber of Commerce presents the University of Arizona with a pair of iron gates for its main entrance.
1922: Thirty businesses are flooded, the power plant fails, three bridges are washed out and many Mexican adobe dwellings dissolve into mud in the twin cities of Nogales.
2011: The Wallow Fire, which is the largest recorded Arizona wildfire, is contained after burning 538,049 acres in eastern Arizona over 41 days.
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