The Weekend team are taking a break. So for the next two weeks, we’re looking back at some of our favourite pieces of the year. Michelle Obama reads an exclusive extract from her book The Light We Carry: Overcoming in Uncertain Times (2m05s); are you a stehpinkler or a sitzpinkler? Sam Wollaston extols the virtues of sitting down to pee (28m23s); and three decades on, the only survivor of a plane crash reflects on how the trauma changed her (41m23s).