Blinken Switches Planes After Oxygen Failure En Route From Davos; Incident Adds to Boeing 737 Scrutiny
• Secretary of State Blinken's original plane grounded in Zurich due to oxygen system failure
• He was switched to a new plane without press pool due to limited capacity
• Blinken was returning from World Economic Forum summit in Davos, Switzerland
• Incident follows issues with Boeing 737 Max planes and scrutiny of manufacturer
• Blinken's trip occurs as FAA investigates company that makes doors for Boeing 737 Max