Boeing's 737 safety mess just got worse

The National Transportation Safety Board has more concerns about Boeing's planes.It said at least 40 airlines outside the US may be operating aircraft with risky rudder parts.This is the latest blow to Boeing, which has been plagued by safety probes. Sign up to get the inside scoop on today’s biggest stories in markets, tech, and business — delivered daily. Read preview Thanks for signing up! Go to newsletter preferences Thanks for signing up! Access your favorite topics in a personalized feed whi ...