This week, Prime Minister Mark Carney is in the United Arab Emirates to try to shore up foreign investment ahead of next week’s G20 summit in South Africa. Human rights groups and Sudanese activists are calling on Carney to condemn the U.A.E. for allegedly sending weapons to Sudan — a claim the country denies — but federal officials won’t say whether he’ll raise the issue. Geoffrey York is the Globe’s Africa Bureau Chief. He’s on the show to talk about what’s been happening in Sudan and why Carney and other foreign leaders are hesitant to put pressure on the U.A.E.