There are three different types of respirators: an air-purifier, an air-line or air-hose respirator, and a self-contained breathing apparatus (SCBA), also known as scuba equipment ... and other ...

An Alabama inmate convicted in a 1994 murder died Thursday in the state's third nitrogen hypoxia execution this year. The ...

Alabama began using nitrogen gas earlier this year to carry out some executions. The method involves placing a respirator gas ...

An Alabama man convicted in the 1994 killing of a hitchhiker cursed at the prison warden shortly before he was put to death Thursday evening in the nation's third execution using nitrogen gas.