OTTAWA — Prime Minister Mark Carney weighed in to the debate about Air Canada CEO Michael Rousseau’s unilingual English video in which he offered his condolences for the loss of two pilots who were killed in Sunday’s crash at the LaGuardia airport. “We proudly live in a bilingual country, and companies like Air Canada, particularly, have a responsibility to always communicate in both official languages regardless of the situation. I’m very disappointed as others are, rightly so,” Carney said on Wednesday morning. The prime minister, speaking on his way to a Liberal caucus meeting,...