Combine three wary nations, deep historical mistrust, rapid technological change, the most destructive weapons ever developed and a US unwilling to extend Thursday’s last formal nuclear weapons guardrail, and you have the ingredients for much worse geopolitical tension, if not a slide towards global disaster, warn nuclear weapons negotiators, analysts and former government officials. While Moscow has offered to formally extend its New Strategic Arms Reduction Treaty (New Start) with the US for another year, US President Donald Trump has refused, arguing he can forge a “better agreement” that includes China, a move many, including Beijing, see as a non-starter….