North Korea has killed political prisoners in gas chambers

North Korea has killed political prisoners in gas chambers designed to test chemical weapons, according to an investigative documentary broadcast by Britain's BBC television yesterday. 
A former North Korean prison officer described how entire families were put to death inside a glass chamber, as government scientists watched. The allegations were supported by what the BBC programme said were official North Korean documents confirming how prisoners were used to test chemical and biological weapons.
"I witnessed a whole family being tested on suffocating gas and dying in the gas chamber," said the former officer. "The parents were vomiting and dying, but till the very last moment they tried to save kids by doing mouth-to-mouth breathing."
The documentary, titled Access to Evil, represented arguably the most serious allegation of human rights abuses levelled against the secretive Communist state, which George W. Bush, US president, once named as part of an "axis of evil".