Work action by Belgian air traffic controllers brought flights to a halt at Brussels Airport on Tuesday. The air traffic controllers staged an unannounced action on April 12th to protest Belgocontrol making changes to employees’ retirement benefits. Brussels Airport, which reopened on April 3 after being closed by the terrorist bombing at the airport, initially said “no air traffic control [was] possible” on Tuesday afternoon as “Belgocontrol looks for operational solutions” to the controllers’ work action. Later, the airport said “a limited number of flights” would be possible during a two-hour window late in the afternoon.