OTTAWA - The Supreme Court of Canada is hearing arguments in Ottawa Thursday for and against the operation of Vancouver's Insite heroin-injection centre...The Conservative government led by Prime Minister Stephen Harper refused to extend the exemption in 2008 and the group operating the facility has been successfully fighting the decision in lower courts. But NDP Drug Critic, and MP for Vancouver-East Libby Davies, says the facility - the first of its kind in Canada - saves lives. "I find it appalling that the federal government has fought Insite every step of the way." Davies said. "The Conservatives are so rigid on their own ideological position, that they refuse to look at the overwhelming scientific evidence, more than 20 studies, that show Insite is part of the solution."