21.   They barricade him inside his house, then repeatedly fire giant custom-made guns until the frame building collapses.

22.   To be sure, researchers concede that the monitoring system will never totally eliminate plane crashes or building collapses.

23.   Under normal circumstances, fire suppression systems are designed to allow a high-rise blaze to burn itself out before the building collapses.

24.   An investigation into the cause of the building collapse is continuing, the Army said.

25.   Authorities have begun investigating building contractors and developers during the past year after repeated building collapses in Bombay due to faulty construction and substandard material.

26.   Building collapses are not unusual in Egypt and are often caused by shoddy construction or the unauthorized addition of extra stories.

27.   Building collapses are not unusual in Egypt.

28.   Building collapses are not uncommon in Egypt where poor families often must use shoddy materials to build their homes.

29.   Building collapses are not unusual in Egypt and often are blamed on shoddy construction or the unauthorized addition of extra stories.

30.   Building collapses linked to shoddy construction are common in Bombay, particularly during the rainy season.