German Chancellor Angela Merkel's flight was delayed by several hours early Tuesday morning after the Iranian government decided at the last moment to deny permission for the aircraft to fly through its airspace, reports said.
Aviation regulators will order tougher inspections of hundreds of Boeing 757 planes worldwide, after a recent in-flight incident that left a hole in the fuselage of an American Airlines plane.
Argentina's airlines on Tuesday suspended all flights indefinitely due to safety concerns in regards to the volcanic ash stemming from the Chilean Puyehue volcano.