Alabama's execution chamber at Holman Correctional Facility in Atmore, Alabama, in 2002.
Mandatory Credit: Dave Martin/AP/File
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Alabama carries out first known execution with nitrogen gas in the US
Alabama inmate Kenneth Smith was put to death Thursday night by nitrogen hypoxia, marking the nation’s first known execution using that method. Now the state’s attorney general wants to help other states interested in using the new form of capital punishment.
