Shai Navé Feb 3, 2009:

You might consider rephrashing the target term It is hard in Hebrew to find an exact term without a little re-phrasing.
I think that something along the lines of:
פוצצו/פיגעו/מוטטו/החריבו שני מבנים תוך שעה אחת, וגרמו לקריסתם פנימה.
Also what Ron has suggested פוצצו ומוטטו פנימה is another great suggestion in my opinion.

Lingopro Feb 3, 2009:

True, but... I agree that מוטטו doesn't say that the collapse is inward, but it definitely suggests that the collapse is intentional/by force.

Ron Armon Feb 3, 2009:

You won't find one word It is also harder to find the right term for what the perpetraters did, since -
פיצוץ פנימה
קריסה
refer to the buildings...