Vice president and prime minister of the United Arab Emirates Sheikh Mohammed bin Rashid al-Maktoum:  the UAE is among the countries engaged in a economic and diplomatic boycott of Doha since mid-2017. Photograph: Bandar al-Jaloud/AFP/Getty

A Gulf Arab summit called for regional unity as Bahrain and Qatar traded barbs over the Qatari emir’s decision not to attend the gathering in Saudi Ar(...)