• Saab lands order from the U.S. army
• Swiss Gripen fighter decision may take all year

AP said that about a dozen of Swedish defence company Saab's Gripen fighter jets were barred from taking part in a Nordic air exercise Tuesday because of an abnormally strong high pressure system.

The pressure is so extreme the planes' instruments are getting confused and issuing error signals, base commander Mats Hakkarainen told the newswire, adding that it's not that it's unsafe to fly.

The national weather agency says the atmospheric pressure in northern Sweden reached a 40-year high on Sunday.