Your "need to know" news of the world's water from Circle of Blue. Stories this week: the Mekong River Commission asks China for more information about its dam operations, the expansion of informal settlement outside Caracas is another sign of Venezuela's economic collapse, U.S. commercial insurers examine Legionnaires' risks in buildings, Nevada regulators restrict groundwater pumping north of Las Vegas to protect an endangered fish, plus CoB story on Colorado River.