BEIRUT - Lebanon announced it cannot meet its debt payments and halted a March 9 bond payment of $1.2 billion on Saturday, setting the heavily indebted state on course for a sovereign default as it grapples with a major financial crisis. In a televised address to the nation, Prime Minister Hassan Diab said foreign currency reserves had hit a “critical and dangerous” level and were needed to meet basic needs. He called for “fair” negotiations with lenders to restructure the debt. The default will mark a new phase in a crisis that has hammered the economy since October, slicing around...