The Caribbean island, which shares a close yet fraught relationship with the rest of the United States, faces a multilayered economic and social crisis rooted in long-standing policy and compounded b…

The sprawling U.S. water system is central to the nation’s economy, but chronic underinvestment, increasing demand, and the consequences of climate change have revealed the system’s weaknesses.  

Tech and auto companies in the United States, Europe, and Asia are moving forward rapidly with efforts to develop driverless cars and street networks. The benefits appear tantalizing, but roadblocks …