We have a 4 hour layover in BRU in early January, landing at 7 AM and leaving at 11:55 AM (Th Jan 4). I have searched, and old threads from 3 or 4 years ago have mentioned that leaves plenty of time to go to Brussels Centraal and walk around a bit, see the Grand Place have a waffle or a beer.

However, is that still the case after airport terrorist attacks from last year? How is security to go back in and head for a US-bound flight (bags should be checked through)? Is anything open at 8 or 9 AM in downtown? Or better spend those 5 hours in the lounge?

Thanks!