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In page Walla Walla, Washington:

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Until October 11, 2018, Washington was a death penalty state, and occasional executions took place at the state penitentiary; the last execution took place on September 10, 2010.[3][4] Washington was also one of the last two states to allow hanging as a choice when sentenced to death[5] (the other being New Hampshire); there has not been a hanging since May 1994 (the default method of execution was changed to lethal injection in 1996). Washington was the last state with an active gallows.[6]