Bahrain's Foreign Minister Khalid bin Ahmed Al Khalifa has said a planned Gulf security alliance, expected to include Egypt, will be formed by next year. At a security summit in capital Manama on Saturday, Khalifa said the Middle East Strategic Alliance (Mesa), an initiative pushed by US President Donald Trump to confront Iran, will help the Gulf remain "a pillar of stability". White House officials have called the MESA alliance an "Arab Nato".