how such a thing could happen in their city. the transport infrastructure of the city is still very much affected by the lock down that has been put in place by the police. many stations are still closed. those that have reopened only have one entry access into the build with strong security measures in place. many roads are still closed. of course, from the point of view of the investigation into what happened, the authorities now have a massive operation undeay. >> reporter: main hunt in belgium. police launch raid to find the attackers who carried out tuesday's back to back bombings. in brufs and across the country-- brussels and across the country security is tight. the country's federal prosecutor has confirmed that this is the image of three suspect behind the blasts at the airport. two of them were apparently suicide bombers. the third on the far right remains at large. in the immediate aftermath of the attack, an haze of confusion