He said an investigation will reveal what took place . Northwest Airlines co - pilot denies reports of cockpit argument . Northwest Airlines missed Minneapolis by 150 miles . NTSB investigating 78 minutes of radio silence . Flight crew clean and sober , police report says .
Northwest Airlines co - pilot denies reports of cockpit argument . Northwest Airlines missed Minneapolis by 150 miles . NTSB investigating 78 minutes of radio silence . Flight crew clean and sober , police report says .