11. Iraqi cars were lined up inside of the blast wall when the car bomb exploded. 12. About half of the surviving park shelters had concrete blast walls , while half used brick. 13. The car bomb plowed into concrete blast walls and protective barriers surrounding the ministry offices. 14. The shelters contained an open entrance at either end protected by an internal blast wall . 15. The transmitter halls, each containing a pair of these transmitters, were separated by heavy blast walls . 16. The force of the explosion Sunday blew over at least one section of the blast wall . 17. Each hut was brick-built with blast walls , and then a disguising outer covering was put over it. 18. Now a 12-foot ( 3 . 6-meter )-high concrete blast wall is going up around the station. 19. American soldiers protect the Sheraton, which is ringed by a concrete blast wall to ward off bombing attempts. 20. The Baghdad bomb exploded outside a 3-foot-high concrete blast wall that protects a U . S . checkpoint.
