Time for a truce in Gaza!   Peace action urgent before existing conflict degenerates into wider war; dangers shown in 1972 Kippur War, when rapid escalation loomed; US must stop blocking calls for cease-fire by UN Security Coucil; Blinken says Netanyahu never delivered proof that Hamas was operating in Gaza TV tower; At what point might swarming Hamas missiles overwhelm conventional Iron Dome? Details emerge about Trump's lame duck plan to retreat from world.