Oil prices have spiked after drone attacks in Saudi Arabia have taken 5% of global supply off the table. Our expert Chris Weafer tells us why Saudi is still the world’s oil safety net, as nobody has the same capacity. Meanwhile, 50,000 United Auto Workers union members say they'll walk out, after General Motors fails to reach a new pay deal with them. And can Africa produce more scientists? We talk to those trying to encourage more to do scientific and engineer-focused careers across the continent. (Image: Smoke coming out of an Aramco oil facility earlier in September. Credit: AFP/ Getty Images)