Lufthansa's boss called delays to Boeing deliveries 'extremely annoying,' and it further highlights a growing dilemma for the aviation giant

• The CEO of Europe's biggest airline called Boeing's delivery delays "extremely annoying."
• The planemaker has slowed production to focus on safety in the wake of the Alaska Airlines blowout.
• Boeing is facing a difficult dilemma: whether to prioritize speed or safety.

The CEO of Lufthansa has become the second airline boss in recent days to voice his frustration with Boeing over delivery delays.