11.   The industry also should adopt a policy of recommending that planes try to land immediately if smoke from an unknown source is detected, the board said.

12.   The smoke was detected in an area on the fourth floor where aides to Hastert and other Republican leaders work.

13.   While on the runway, the pilot detected smoke in the cabin and decided to evacuate the aircraft, deploying the emergency chutes, Morrison said.

14.   Firefighters were called briefly to the United Nations on Monday after smoke was detected in an elevator shaft, security officials said.