What to know

• U.S. accuses Iran of failing to honour an agreement to reopen the Strait of Hormuz, while Tehran says Washington has reneged on its commitmentsS1
• By Parisa Hafezi and Elwely ElwellyDUBAI, Aug 12 (Reuters) - Iran and the United States remain at loggerheads over efforts to agree a permanent end to the war in the Gulf, according to a senior Iranian source who said there had been no progress in talks to rev...S2