The Maelbeek subway station in Brussels where 16 people were killed in a suicide attack reopened Monday, just over a month after the deadly bombings. Suicide bomber Khalid el-Bakraoui blew himself up at the station on March 22, an hour after two other terrorists killed 16 other people at the international airport.Security remains high across the underground network, which is now back to full capacity after the attacks. Brussels Metro spokeswoman An Van Hamme said "there wasn't any structural damage. So there were a few works that had to be done."Commuters are leaving messages on a tribute wall in the main station entrance.