Cleaning crews were still clearing the rubble and broken glass, and barriers proclaiming a “maintenance zone” blocked what had always been the main arrivals area, but just a half day after suicide bombers staged a major terror attack at Istanbul’s main airport, the crowds had returned and most flights were operating.

It wasn’t quite business as usual at Ataturk airport, one of Europe’s busiest, but the recovery seemed remarkable, and there was little sign of enhanced security. Some passengers no doubt stayed home, but there were long lines at airline check-ins, and even longer lines at ticket offices to rebook their flights.

Forty-two people were killed, 12 of them foreigners and the rest Turks, and 239 wounded, according to the Turkish government. Among the wounded were an American and a Canadian, but officials did not give their names. Nor did the government identify the three suicide bombers, who arrived by taxi Tuesday evening toting explosive vests and submachine guns.

One of them blew himself up near the entrance to the arrivals section, and in the confusion, the other two entered the arrivals area, shot people randomly and then blew themselves up.