China eyes Canada oil, US's energy nest egg

``Apart having a stake in the $5.5 billion in the Northern Gateway pipeline plan, Sinopec paid $4.6 billion for a nine percent stake in Syncrude, Canada's largest oil sands project. And in 2009 PetroChina, Asia's largest oil and gas company, bought a $1.7 billion stake in Athabasca Oil Sands Corp. William Cohen, who was secretary of defense in the Clinton administration, said any Chinese-Canadian oil partnership must be done "with some diplomacy and care," in a way that isn't "a threat to the United States."''