By Yelena Mandenberg America is to move forward with its first-ever nitrogen gas execution on Thursday as a US inmate faces the death penalty for a second time. United Nations experts have “expressed alarm” over inmate Kenneth Eugene Smith’s looming execution, saying this month in a news release, “We are concerned that nitrogen hypoxia would result in a painful and humiliating death.” The UN High Commissioner for Human Rights called on Alabama to halt the execution, saying it “could amount to torture or other cruel, inhuman or degrading treatment or punishment under international human rights …