Someone saw something, and said something

I was entering the Government Center T station on the way home last night as a moderate crowd was leaving. All the gates were open, and an anxious T official was preventing people from entering, saying "move away from the station, use State Street or Park Street instead!" Clearly, drama was taking place. I was considering the best way to get to Park when a cop came out of the station and told the official "all clear". She told the crowd that had gathered that we could now enter, and told me to keep moving when I asked what was going on -- obviously someone reported something suspicious, no doubt thanks to General Manager Dan Grabauskas's recorded pleas to do so, which are played two or three times between each arriving train.

So I went down into Government Center without any clue why they'd closed it and then reopened it just as I arrived. Imagine my surprise when I saw they hadn't evacuated the entire station: there were still close to a hundred people waiting for for the Green Line downstairs; most of them were the college/tourist crowd that hangs out in Quincy Market on a Saturday night, and clearly hadn't just transfered from the Blue Line in the few seconds it took me to get downstairs. So I have no clue what was going on, but it sure does make a guy feel safe.