Rubio kicks off Gulf 'charm offensive' amid allies' fears over US - Iran deal

US Secretary of State Marco Rubio acknowledged he faces a delicate mission this week pitching Washington's Iran peace deal to Gulf Arab leaders who fear excessive concessions will strengthen Tehran and reshape the region's security balance and oil flows. Rochelle Ferguson-Bouyahi takes a closer look at what she says is likely to be a "charm offensive" from the US's top diplomat.