Iran failed to reach a final deal with the U.S. by Monday’s deadline, leaving disputes over Tehran’s nuclear program and the Strait of Hormuz unresolved nearly six months into the war.Tehran instead announced an understanding with Oman on a new commercial transit route through the strait, but the plan cannot take effect without U.S. approval, and leaves unresolved Washington’s blockade, Iran’s nuclear program and the broader negotiations.Hormuz, where a fifth of the world's oil traverses, remained at the heart of the deadlock, leaving the two sides without a path to a broader agreement on endi...