St. Louis officers had noticed the man, who was not identified, in an area where he should not have been and refused to leave.

Knife-wielding man shot and killed by police at St. Louis airport - Officers did not believe the man was ‘using the airport as travel’ ...

Police shot the suspect after he refused to drop his knife, officials said.

ST. LOUIS -- An officer at St. Louis' busiest airport fatally shot a man who wielded a knife early Friday outside the doors of a terminal, police said. No one else was injured. The shooting at St.