China-Canada trade deal announced

President Xi Jinping stressed that both sides should respect each other's sovereignty and integrity. Canadian PM Mark Carney described China as a realistic and respectful trading partner. He added that it was also more predictable than Washington. We explore what this signifies for the world. Also on the programme: Iran's most prominent historian, Ervand Abrahamian, assesses the current wave of protests which have engulfed the country. And Helen Macdonald, the author of the much-loved memoir, and forthcoming movie, "H Is For Hawk," discusses nature, mourning and the difficulties of seeing yourself portrayed onscreen.(Picture: Canada's PM Mark Carney and China's President Xi Jinping. Credit: Reuters)