Pledge to King Riyadh, June 18, SPA -- The Kingdom of Saudi Arabia is to celebrate on Friday the 4th anniversary of the allegiance-pledge to the Custodian of the Two Holy Mosques King Abdullah bin Abdulaziz Al Saud who ascended the throne on 26/6/1426H. Saudi Press Agency (SPA) reported today that over the past four years, developments in the kingdom's various sectors have boomed reaching unprecedented levels of prosperity and welfare. On the domestic front, developments in education, health, economy, industry, transport and national welfare have surpassed a number of giant economic cities. This includes also the Kingdom's increased and effective international presence as well as its crucial role in sponsoring dialogue and mutual understanding. The Kingdom is also a member of a number of influential world organizations including the Group of Twenty (G20).