What to know

• Pakistan's army chief is in Tehran in a bid to revive mediation to end with war with Washington, as the US prepares to outline punishing new sanctions on Iran.S1
• By Menna Alaa El-Din and Kanishka SinghCAIRO/WASHINGTON, Aug 24 (Reuters) - Pakistan's army chief was visiting Tehran on a mediating mission on Monday as the United States prepared to roll out "the greatest financial offensive ever" targeting Iran's trade part...S2