Building 7 locked before second plane hit?

[worcesteradam]

In the book The Sink there is an account by Joe Webber, the special agent in charge of US Customs for New York:

Joe Webber was in a staff meeting that morning, on the seventh floor at Six World Trade Center, when the first plane hit (08:46 AM).
Ordered everybody to reassemble at Seven World Trade – at the emergency command post that the City of New York maintained there –
By the time he arrived at Seven World Trade, there was debris and panic and confusion raining down all over the block. The doors to the command post were locked. They couldn’t get in. That’s when the second plane hit. (09:03 AM).

http://imageshack.us/f/208/pg283.jpg/

http://letsrollforums.com/wtc-7-emergency-command-t21659.html