U.S. 'beginning' internal discussions about renewing North American trade pact

For anyone with lingering night terrors from the last renegotiation of NAFTA, the notion of reopening the pact might evoke that classic line from a horror sequel: It's baaaaa-aaaack. But this time is different, says the U.S. envoy to Canada. On his second anniversary in Ottawa, David Cohen says he's heartened by the constructive mood.