21.   He said the problem was with the metal strips in the heels of his boots.

22.   Investigators believe a Continental jet may have been the source of a metal strip on the runway that could have contributed to the accident.

23.   Investigators believe one of the tires of the Concorde burst after running over a stray metal strip on the runway.

24.   Investigators believe the metal strip fell onto the runway from another plane just minutes before the doomed Concorde took off from the same runway.

25.   On Friday, the Accident and Inquiry Office reported the discovery of the metal strip without further comment.

26.   The article said the metal strip had been turned over to French and British investigators.

27.   The metal strip is believed to have come from a Continental jet that took off earlier.

28.   The metal strip is believed to have come from another jet.

29.   They blame two small metal strips attached to the roof and spoilers, which were mandated by NASCAR in an attempt to promote closer racing.

30.   Those shoes also have a thin metal strip on the outside of the heel that can protrude and form a sharp edge.