It was meant to be a secret, but like all office secrets people knew something was happening. Little clusters of people standing around a desk looking at a screen broke up and walked back to their own desks when someone came near, whispered conversations in the photocopy room and the inevitable smoke break with one of the non smokers saying "I'll come out for some fresh air".
Finally the news was broken. There was a major project being planned. It was going to involve a select bunch of people who were part of the project team and privy to the specific details, but the overall project was at least no longer a secret. An interoffice email went out from the internal communications manager and overnight a bunch of project flyers were put up on walls and doors.