BERLIN German airline Lufthansa said Friday its planes would no longer use Iranian airspace as it extended a suspension on flights to and from Tehran amid soaring Middle East tensions. "Due to the current situation, Lufthansa is suspending its flights to and from Tehran up to and including Thursday, 18 April," a company spokesperson said Friday. "The airline is also no longer using Iranian airspace." Its subsidiary Austrian Airlines followed suit. The flights to the Iranian capital have been