This week marks 100 days since four Arab states began a blockade against Qatar, sparking a diplomatic crisis. Saudi Arabia, the United Arab Emirates, Bahrain and Egypt accuse Qatar of supporting extremism, which it denies. Saudi Arabia usually takes the lead in Gulf affairs, but what is interesting this time is the prominence of the UAE. Al Jazeera's Hashem Ahelbarra explains. - Subscribe to our channel: http://aje.io/AJSubscribe - Follow us on Twitter: https://twitter.com/AJEnglish - Find us on Facebook: https://www.facebook.com/aljazeera - Check our website: http://www.aljazeera.com/