''Asahi TV: “Unbelievable” — If Unit 4 pool gets a crack from quake and leaks, it would be end for Tokyo -Expert — Doesn’t have to be large tremor, already shaken many times''

From EneNews

"Title: Expert Warns: “If Unit 4 Collapsed, That Would Be the End”
Source: “Morning Bird” by TV Asahi
Uploaded by: tokyobrowntabby
Date Aired: Mar 8, 2012
Emphasis Added

Most discussion of the No. 4 spent fuel pool has focused on an earthquake causing the pool to collapse. This video is different because it reveals:"......see the video and.....read more