Morning Bombs For A Late Afternoon Demolition?

This video raises a point I haven’t thought of before: Why would the evil 9/11 conspirators set off bombs in WTC7 in the morning for a demolition that happened in the late afternoon? (Not that conspiracy theories have to make any sense.) There’s also a good quote from FDNY Chief Nigro and an interesting sound clip from the Democracy Now broadcast of 9/11/01.