In this week’s most shared tweets: The weekend began with widespread protests in the wake of President Donald Trump’s executive order suspending travellers to the US from some parts of the world. The order, just before the weekend, caused chaos and confusion at airports across the US, promoting protesters to converge and lawyers to offer pro bono help to passengers impacted by the ban. Also this week – the scourge of child marriage in Africa, and the despair of refugees stranded on the Greek island of Lesbos.