An American Airlines spokesman said the pilot was troubled by "inconsistencies" in the paperwork required for the agent to carry a weapon on the aircraft

The Secret Service confirmed that an agent, whom it would not identify, was asked to leave a flight from Baltimore-Washington International Airport to Dallas, Texas.

The pilot was not satisfied with the responses of the agent, who was armed and in civilian clothes, said Jim Mackin, a Secret Service spokesman

http://www.cnn.com/2001/US/12/28/rec...ine/index.html