The Panama Canal uses a series of locks to raise the water level and carry ships across from one ocean to the other. But that requires lots of freshwater — and it's running low in Panama. And, On Wednesday, Zimbabweans will take to the polls to vote for their next president. Observers are saying this election is marred by violence and intimidation against the opposition and its supporters. Also, right now, in South Africa, the BRICS summit is in full swing. BRICS stands for Brazil, Russia, India China, South Africa, an economic bloc of countries billed as five major emerging economies collectively representing 40% of the world’s population. Plus, remembering Isabel Crook, an anthropologist who joined Mao Zedong’s rural revolution.