Ahead of the federal carbon price rise in April, ‘The West Block’ host Mercedes Stephenson speaks with Environment Minister Steven Guilbeault about the push by some provincial premiers and Conservative MPs to scrap the levy, the role of large emitters in reducing emissions and more. Plus, Stephenson is joined by retired U.S. general David Petraeus, a former CIA director, to discuss concerns over terror attacks from the Islamic State (ISIS), the Israel-Hamas conflict and the situation in Ukraine. Petraeus also addresses Canada’s capabilities to respond to global threats.