US decision to amass B-2 bombers at Diego Garcia is result of Gulf Arab monarchs closing airspace to American warplanes in event of war with Iran Saudi Arabia and other Gulf states have imposed a ban on US warplanes using their air fields or skies to attack Iran after US President Donald Trump over the weekend threatened to bomb the country. Saudi Arabia, the UAE, Qatar and Kuwait have all told the US they will not permit their airspaces or territories to be used as a launchpad against Iran, including for refuelling and rescue operations, a senior US official told...