The collapse of WTC 7 occurred at 5:21:10 pm on September 11th, 2001, hours after the collapse of the two main twin tower buildings. The complete truth on why this building collapsed remains a mystery to the people directly affected by the terrorist attacks that happened that day. Those people, along with the rest of the American public, have the right to know why their loved ones lost their lives in the collapse.
There are some who speculate that WTC 7 did not collapse as a result of stress from the Twin Towers' collapse, but as a result from being intentionally demolished. There are many scientific endeavors which have come to conclusions that would suggest similarly. (http://www.youtube.com/watch?v=hZEvA8BCoBw)
The American public has the right to know what happened that day.